📋 Key Takeaways
- Retrofit Kit Types: Complete Selection Matrix for B2B Procurement
- Existing Fixture Compatibility Matrix: What Retrofit Kit for What Fixture
- Retrofit vs Replace Decision Tree: A Quantitative Framework
- NEC and UL Compliance for Retrofit Kits: What Procurement Must Verify
- Labor Factors: The Hidden Costs of Retrofit Installation
- 10-Year TCO Comparison: Retrofit vs New Fixture, 200-Fixture Warehouse Case Study
Published: June 2026 | Author: Simon Chen, Senior LED Supply Chain Expert | Category: Procurement Guide / Retrofit & Conversion Solutions
LED Retrofit Kit Selection Guide: Converting Fluorescent, HID and Incandescent Fixtures to LED for B2B Projects (2026)
The global commercial building stock contains an estimated 2.5 billion installed fluorescent and HID luminaires — and fewer than 30% have been converted to LED as of 2026. For B2B procurement professionals, facility managers, and electrical contractors, this represents both a massive addressable market and a complex procurement decision: should you replace the entire fixture, or install a retrofit kit that converts the existing housing to LED? The answer can swing project costs by 40–60% and installation timelines by weeks.
Retrofit kits, from LED tube replacements (Type A, B, C) to HID conversion kits, magnetic strip retrofits, troffer inserts, and downlight modules, have matured dramatically since 2020. Modern retrofit kits from manufacturers like Kingseng deliver 130–160 lm/W system efficacy, 50,000–100,000 hour lifespans, and UL 1598C safety certification that ensures the converted luminaire passes electrical inspection. This guide provides procurement professionals with a complete framework for retrofit kit selection: which retrofit kit works for which existing fixture, how to make the retrofit-versus-replace decision with hard numbers, labor cost modeling, NEC and UL compliance requirements, and a 10-year TCO comparison for a 200-fixture warehouse project.
Direct Answer: SCWritten by Simon Chen, Senior LED Supply Chain ExpertSimon has 8+ years of hands-on experience in LED lighting manufacturing and B2B export from Shenzhen, China.
Retrofit Kit Types: Complete Selection Matrix for B2B Procurement
The retrofit kit market has expanded well beyond LED tubes. The table below maps the nine major retrofit kit types to the existing fixtures they convert, providing procurement professionals with a single-reference selection matrix. Use this table during the facility audit phase to match the existing installed base to the correct Kingseng retrofit product.
| Retrofit Kit Type | What It Replaces / Converts | Installation Complexity | Labor Hours per Fixture | Downtime Required | Kingseng Retrofit Model & Notes |
|---|---|---|---|---|---|
| LED Tube Type A Plug-and-Play / Ballast-Compatible |
Converts T8/T5/T12 linear fluorescent tubes in existing fluorescent fixtures. Works with electronic (instant-start, rapid-start, programmed-start) ballasts. Does NOT work with magnetic ballasts — must be Type B or replace ballast first. | Low No rewiring required |
0.05–0.1 (3–6 min) |
Minutes Lights off only during bulb swap |
Kingseng KS-T8A Series. 18W (4ft), 120–277V universal. 130 lm/W. Compatible with 90%+ of installed electronic T8 ballasts per Kingseng compatibility database. Procurement note: specify ballast compatibility list in RFQ, Kingseng provides a 12-page compatibility matrix covering Philips Advance, Osram Sylvania, Universal, and GE ballast models. Ballast failure within 3–5 years is the #1 callback cause, budget for eventual Type B conversion. |
| LED Tube Type B Ballast-Bypass / Direct Wire |
Converts T8/T5/T12 fluorescent fixtures. Ballast is removed; tombstones (sockets) are wired directly to line voltage. Works with shunted or non-shunted tombstones (double-ended wiring). Single-ended wiring configuration also available (line on one end, neutral on the other). | Medium Requires rewiring per fixture |
0.15–0.25 (10–15 min) |
Circuit OFF Circuit must be de-energized for rewiring safety; downstream fixtures also affected if on same circuit |
Kingseng KS-T8B Series. 18W (4ft), 120–277V. 145 lm/W. Double-ended wiring (simplest: line to one end, neutral to other). Frosted lens eliminates LED pixelation. Procurement note: this is the most popular commercial retrofit — ~70% of Kingseng tube shipments are Type B. Eliminates ballast energy loss (2–5W saved per tube). Requires per-fixture rewiring sticker (included) for NEC compliance, must label fixture as modified for LED. |
| LED Tube Type C External Driver with New Sockets |
Converts T8/T5 fixtures. Fluorescent ballast and existing sockets are removed entirely. New external LED driver + new non-shunted sockets are installed. The LED tube itself contains no electronics, all power conversion is in the external driver. | Medium-High Driver + socket replacement |
0.35–0.5 (20–30 min) |
Circuit OFF Extended downtime: driver mounting + socket replacement + wiring per fixture |
Kingseng KS-T8C Series. External driver (0–10V or DALI-2 dimming options). 18W per tube, 150 lm/W system (driver + tube combined). Procurement note: best option when dimming is required, the external driver provides smooth 0.1%–100% dimming without the flicker issues common in Type A/B internal-driver tubes. External driver is field-replaceable without changing the tube, extending overall system lifespan. Premium price point (2–3× Type B) but lowest 10-year TCO in dimming applications. |
| Magnetic Strip Retrofit Linear LED Module with Magnetic Mount |
Converts fluorescent strip fixtures (4ft/8ft industrial strips, vapor-tight strips, wrap fixtures). Pre-assembled linear LED module with magnetic backing attaches inside the existing fixture housing. Ballast is bypassed; module connects directly to line voltage. | Low-Medium Magnetic snap-in + wiring |
0.15–0.25 (10–15 min) |
Circuit OFF Shorter than Type B, no tombstone rewiring needed |
Kingseng KS-MSR Series. 24W/48W/72W per 4ft/8ft module. 150 lm/W. Magnetic backing attaches to steel fixture housing, no drilling or screws. Driver integrated into module. Procurement note: faster than Type B tubes for strip fixtures because there are no tombstones to rewire. The module replaces all tubes in a 2-lamp or 4-lamp strip fixture with a single unit. Ideal for warehouse and industrial strip lighting retrofits. |
| HID-to-LED Conversion Kit High Bay / Low Bay HID Replacement |
Converts HID (metal halide, high-pressure sodium, mercury vapor) high bay and low bay fixtures, typically 250W–400W. Kit includes LED module, driver, mounting bracket/adapter plate, and reflector or lens. Ballast is bypassed; capacitor and ignitor are removed. Existing fixture housing is retained. | Medium-High Ballast removal + bracket + wiring |
0.5–1.0 (30–60 min) |
Circuit OFF + Lift Access High bay = scissor/boom lift required. 1–2 fixtures per lift move. |
Kingseng KS-HIDR Series. 100W/150W/200W/240W LED modules (replacing 250W/320W/400W/500W HID). 150 lm/W. Includes universal mounting bracket (fits 90% of HID housings). Procurement note: the #1 specification check is the existing reflector condition, if the HID reflector is corroded, oxidized, or physically damaged, the retrofit wastes 15–25% of light output. Budget reflector replacement or upgrade to full fixture replacement if the reflector score is below 3/5. Kingseng includes a reflector condition assessment guide with every HID retrofit order. |
| Troffer Retrofit Insert 2×2 or 2×4 Drop-In LED Panel |
Converts 2×2 and 2×4 fluorescent troffer fixtures (lensed or parabolic louvered) in T-grid suspended ceilings. The retrofit insert is a complete LED panel (edge-lit or back-lit) with integrated driver that drops into the existing troffer housing after removing fluorescent tubes, ballast, and lens/louver frame. | Low-Medium Drop-in + wiring |
0.2–0.35 (12–20 min) |
Circuit OFF Faster than full fixture swap, no grid modification |
Kingseng KS-TRI Series. 30W/40W/50W (2×2/2×4). 135 lm/W. Edge-lit with PMMA light guide for uniform illumination (UGR < 19). Procurement note: verify the existing troffer housing dimensions before ordering, standard 2×4 troffers accept inserts sized 23.75″ × 47.75″ (fits inside the 24″ × 48″ housing). Some European troffers are metric (600×1200mm) and require a different insert. Kingseng produces both ANSI and metric troffer insert sizes. |
| Downlight Retrofit Module Screw-In or Spring-Clip LED Module |
Converts incandescent/halogen/CFL recessed downlight housings (4″, 5″, 6″, 8″ apertures). The retrofit module includes the LED engine, driver, heat sink, and trim, it replaces the existing lamp, socket, and trim ring as a single unit. Attaches via Edison-base screw adapter or spring-clips to the housing. | Low Screw-in or clip-in |
0.05–0.15 (3–10 min) |
Minutes No circuit de-energizing for screw-in types (hot-swap possible with PPE) |
Kingseng KS-DLR Series. 10W/15W/20W/30W (4″/6″/8″ equivalents). 120 lm/W. Adjustable CCT switch (2700K/3000K/3500K/4000K/5000K). Spring-clip mount with E26 adapter included. Procurement note: verify housing depth before ordering, some shallow housings (IC-rated, < 5" depth) cannot accommodate deep retrofit modules. Kingseng KS-DLR slim profile (2.8") fits 95% of residential and commercial shallow housings. |
| Canopy / Soffit Upgrade Kit Gas Station, Drive-Through, Parking Canopy |
Converts existing canopy/soffit fixtures (typically HID or fluorescent) at gas stations, drive-throughs, parking canopies, and building soffits. Kit includes LED module, driver, and adapter plate that mounts inside or replaces the existing fixture door/lens assembly. | Medium Adapter plate + wiring |
0.3–0.5 (20–30 min) |
Circuit OFF Canopy lighting is safety-critical, daytime work strongly preferred |
Kingseng KS-CNR Series. 40W/60W/80W. 145 lm/W. IP65 rated for outdoor canopy environments. Flat lens for zero uplight (Dark Sky compliant). Procurement note: canopy fixture housings are exposed to weather, fuel vapors, and car wash chemicals, inspect housing integrity carefully. Rusted mounting points may fail during retrofit and require full fixture replacement. Kingseng provides stainless steel mounting hardware with every canopy retrofit kit. |
| Wall Pack Replacement Kit Exterior Wall-Mounted HID to LED |
Converts exterior HID wall packs (typically 70W–400W HID) mounted on building exteriors, loading docks, walkways, and perimeter walls. Kit includes LED module, driver, gasket, and replacement lens/door assembly that bolts to the existing wall pack backplate. | Medium Door assembly swap + wiring |
0.3–0.5 (20–30 min) |
Circuit OFF Exterior work, weather dependent |
Kingseng KS-WPR Series. 30W/50W/80W/120W (replacing 70W/100W/175W/250W/400W HID). 140 lm/W. IP65, IK08 impact rated. Procurement note: wall pack backplate is the most weather-exposed component, remove the old door assembly and inspect the backplate for rust-through before ordering. If the backplate mounting screws are seized or the backplate is perforated by rust, budget full fixture replacement. Kingseng wall pack kits include a replacement backplate option for borderline cases. |
| Flood Retrofit Bracket HID/Quartz Flood to LED Conversion |
Converts exterior HID or quartz flood lights mounted on buildings, poles, or ground stanchions. The retrofit bracket adapts the existing floodlight knuckle/yoke mount to accept a new LED floodlight head, the old HID housing is removed entirely, but the mounting arm, wiring, and junction box are retained. | Medium Bracket + new head + wiring |
0.4–0.75 (25–45 min) |
Circuit OFF Exterior work, lift/bucket truck may be required for elevated floods |
Kingseng KS-FLR Series. 50W/100W/150W/200W LED flood heads. 150 lm/W. IP66. Includes universal knuckle adapter (1/2″ NPS) and yoke bracket for existing mounting arms. Procurement note: verify the existing mounting arm can support the LED flood weight, some LED floods are heavier than quartz floods. Kingseng bracket kits include a safety cable for secondary attachment independent of the primary mount. |
Labor estimates assume 1 electrician with standard tools and lift/scaffold access to fixture mounting height. Add 30–50% for heights >25 ft requiring boom lifts. All Kingseng retrofit kits are UL 1598C listed for specified host fixtures. MOQ: 50 units per model. Lead time: 25–35 days for standard models; 15–20 days for stocked models. Contact simon@ksimpexp.com for a custom retrofit kit matrix matched to your facility’s existing fixture inventory.
Existing Fixture Compatibility Matrix: What Retrofit Kit for What Fixture
This section maps the seven most common existing commercial/industrial fixture types to their compatible retrofit kits, with estimated energy savings and simple payback periods. Use this as your first-pass screening tool during the facility walkthrough audit. For more on this topic, read our guide: Pendant Light vs Chandelier: Commercial B2B Fixture Selection.
| Existing Fixture | Recommended Kingseng Retrofit Kit | Existing System Wattage (Typical) | Retrofit System Wattage | Energy Savings % | Simple Payback (Years) at $0.12/kWh, 4,000 hrs/yr |
|---|---|---|---|---|---|
| Fluorescent Troffer 2×4 3-lamp or 4-lamp T8, lensed or parabolic louver, recessed in T-grid ceiling |
1. KS-TRI Troffer Insert (preferred): 40W edge-lit panel replaces all tubes + ballast + lens. Fastest install, best light quality. 2. KS-T8B Type B Tubes: 4 × 18W tubes (72W total) if housing and lens are in good condition. 3. KS-T8C Type C Tubes: if dimming is required. |
3-lamp: 96W 4-lamp: 128W (incl. ballast) |
Troffer Insert: 40W Type B (4-tube): 72W |
58–69% | Troffer Insert: $48 kit + $12 labor = $60/fixture. Annual savings: $23 (58% of $40/yr). Payback: 2.6 years. Type B (4-tube): $32 kit + $15 labor = $47/fixture. Annual savings: $17 (44% of $39/yr). Payback: 2.8 years. After utility rebate (typically $5–$10/fixture for DLC Premium): payback drops to 1.5–2.0 years. |
| Fluorescent Strip T8/T5 Industrial strip, 2-lamp or 4-lamp, surface or suspended mount, open or vapor-tight |
1. KS-MSR Magnetic Strip Retrofit (preferred): single module replaces all tubes, fastest install, cleanest result. 2. KS-T8B Type B Tubes: if magnetic retrofit module doesn’t fit the housing depth. |
2-lamp: 64W 4-lamp: 128W (incl. ballast) |
MSR-48 (4ft): 48W MSR-96 (8ft): 72W |
44–63% | MSR module (4ft 2-lamp strip): $35 kit + $10 labor = $45/fixture. Annual savings: $7.70 (44% of $17.50/yr). Payback: 5.8 years. MSR module (4ft 4-lamp strip): $35 kit + $10 labor = $45/fixture. Annual savings: $15.40 (56% of $27.70/yr). Payback: 2.9 years. Note: payback is strong for 4-lamp strips, marginal for 2-lamp strips unless rebates are available or operating hours exceed 6,000/yr. Prioritize 4-lamp and 24/7-operation fixtures first. |
| HID High Bay 250–400W Metal halide or HPS high bay, 15–45 ft mounting height, warehouse/factory/gymnasium |
1. KS-HIDR Conversion Kit (preferred): 150W LED replaces 320W MH (250W lamp + 70W ballast). Retains existing housing & reflector. 2. Full fixture replacement: Kingseng LED High Bay if housing/reflector is degraded. |
250W MH: 295W 400W MH: 458W (lamp + ballast draw) |
KS-HIDR-100: 100W KS-HIDR-150: 150W KS-HIDR-200: 200W |
56–66% | KS-HIDR-150 replacing 250W MH: $95 kit + $40 labor (incl. lift) = $135/fixture. Annual savings: $93.60 (66% of $141.60/yr at 4,000 hrs). Payback: 1.4 years. KS-HIDR-200 replacing 400W MH: $120 kit + $45 labor = $165/fixture. Annual savings: $123.80 (56% of $219.80/yr). Payback: 1.3 years. HID retrofit payback is the fastest of any retrofit category due to the massive wattage delta. For 24/7 operations (8,760 hrs/yr), payback drops to 0.6–0.8 years. This is the highest-ROI retrofit category, prioritize HID high bays in the first phase of any multi-site retrofit program. |
| HID Wall Pack Exterior wall-mounted, 70W–400W HID (MH or HPS), building perimeter / loading dock / walkway |
1. KS-WPR Wall Pack Replacement Kit (preferred): new LED door assembly mounts to existing backplate. Retains backplate and junction box. 2. Full fixture replacement: if backplate is rusted through. |
100W MH: 128W 175W MH: 208W 250W MH: 295W 400W MH: 458W |
KS-WPR-30: 30W KS-WPR-50: 50W KS-WPR-80: 80W KS-WPR-120: 120W |
62–77% | KS-WPR-50 replacing 175W MH: $75 kit + $30 labor = $105/fixture. Annual savings: $75.80 (76% of $99.80/yr at 4,380 hrs, dusk-to-dawn). Payback: 1.4 years. KS-WPR-80 replacing 250W MH: $95 kit + $35 labor = $130/fixture. Annual savings: $103.20 (73% of $141.60/yr). Payback: 1.3 years. Exterior wall packs operate dusk-to-dawn (4,200–4,500 hrs/yr typically). Combined with high wattage savings, payback is excellent. Prioritize together with HID high bays for Phase 1. |
| Incandescent Can 6–8 inch Recessed downlight housing, incandescent or halogen BR30/PAR30/PAR38 lamps |
1. KS-DLR Downlight Retrofit Module: 15W LED module replaces 65W–75W BR30 or 75W–100W PAR lamp. Screw-in or spring-clip. 2. Full housing replacement: if housing is non-IC in an insulated ceiling, or if the housing is damaged. |
65W BR30: 65W 75W PAR30: 75W 100W PAR38: 100W |
KS-DLR-15 (6″): 15W KS-DLR-20 (8″): 20W |
73–80% | KS-DLR-15 replacing 75W PAR30: $18 kit + $5 labor = $23/fixture. Annual savings: $28.80 (80% of $36/yr at 4,000 hrs). Payback: 0.8 years. KS-DLR-15 replacing 65W BR30: $18 kit + $5 labor = $23/fixture. Annual savings: $24 (77% of $31.20/yr). Payback: 1.0 year. Downlight retrofits are the fastest-payback category for incandescent-to-LED conversion, the wattage reduction is dramatic and installation is a simple screw-in/clip-in. However, total project savings are lower per fixture ($24–$29/yr) so prioritize spaces with the highest fixture count (lobbies, corridors, retail floors) and longest operating hours. |
| Halogen Flood Exterior halogen flood, 150W–500W quartz, building-mounted or ground stanchion |
1. KS-FLR Flood Retrofit Bracket + LED Flood Head: new LED head on existing mounting arm via adapter bracket. 2. Full fixture replacement: if the mounting arm or junction box is deteriorated. |
150W quartz: 150W 300W quartz: 300W 500W quartz: 500W |
KS-FLR-50: 50W KS-FLR-100: 100W KS-FLR-150: 150W |
67–70% | KS-FLR-100 replacing 300W halogen: $110 kit + $40 labor (bucket truck for elevated) = $150/fixture. Annual savings: $87.60 (67% of $131.40/yr at 3,000 hrs). Payback: 1.7 years. KS-FLR-50 replacing 150W halogen: $75 kit + $35 labor = $110/fixture. Annual savings: $43.80 (67% of $65.70/yr). Payback: 2.5 years. Halogen-to-LED flood conversion has excellent payback for the fixture wattage saved, but labor costs (bucket truck, exterior work) increase the effective cost. Combine flood replacements with wall pack retrofits to share mobilization costs. Higher-wattage floods (300W+) have the best ROI. |
| CFL Recessed CFL downlight or wall-wash, 13W–42W (quad or triple tube), typically 6″ or 8″ aperture |
1. KS-DLR Downlight Retrofit Module: 15W–20W LED module replaces CFL lamp + ballast. Must bypass CFL ballast (line voltage to socket or direct-wire the LED module). 2. Full housing replacement: if housing is deteriorated. |
13W CFL: 16W (incl. ballast) 26W CFL: 30W 32W CFL: 37W 42W CFL: 48W |
KS-DLR-15 (6″): 15W KS-DLR-20 (8″): 20W |
38–58% | KS-DLR-15 replacing 32W CFL: $18 kit + $10 labor (ballast bypass required) = $28/fixture. Annual savings: $10.60 (58% of $18.20/yr at 4,000 hrs). Payback: 2.6 years. KS-DLR-15 replacing 26W CFL: $18 kit + $10 labor = $28/fixture. Annual savings: $7.20 (47% of $15.40/yr). Payback: 3.9 years. CFL-to-LED retrofits have longer paybacks than incandescent-to-LED because CFL efficacy is already moderate (~50–60 lm/W vs LED 120+ lm/W). The energy savings delta is smaller. However, LED retrofits improve light quality dramatically (CRI 90+ vs CFL 80–82), eliminate mercury content, and provide instant-on without warm-up. Prioritize CFL retrofits in spaces where light quality, mercury reduction, or instant-on performance is valued over pure energy payback. |
System wattages are typical and include ballast losses where applicable. Actual savings depend on existing fixture condition, operating hours, and local electricity rates. Simple payback calculated as (kit cost + labor) ÷ annual energy savings at $0.12/kWh. Utility rebates (typically $3–$15 per fixture for DLC Premium listed retrofit kits) further reduce payback by 20–40%. All Kingseng retrofit kits are DLC Premium listed where applicable. For a full financial analysis of your specific facility, contact Kingseng for a customized retrofit payback report, email your fixture inventory to simon@ksimpexp.com.
Retrofit vs Replace Decision Tree: A Quantitative Framework
The retrofit-versus-replace decision is the single most important procurement question for any LED lighting project, and it must be answered with data, not intuition. The framework below provides a six-factor quantitative scoring system that drives to a clear go/no-go recommendation for retrofit versus full fixture replacement.
| Decision Factor | Scoring Criteria | Retrofit Score | Replace Score | How to Assess / Measure |
|---|---|---|---|---|
| 1. Housing Condition Is the existing fixture housing structurally sound? |
5 = Pristine (no rust, corrosion, dents, or discoloration, looks near-new) 4 = Good (minor surface rust or scratches, no structural compromise) 3 = Fair (visible rust or oxidation, surface pitting, but structurally intact) 2 = Poor (significant rust, metal thinning, fastener holes enlarged/stripped, lens cracked or yellowed beyond cleaning) 1 = Failed (rust-through, structural perforation, missing parts, housing physically failing) |
Score 3–5 | Score 1–2 | During facility audit: use a flashlight and inspection mirror. Tap the housing with a screwdriver handle, a dull thud (not a metallic ring) indicates rust thinning. Check fastener holes, if the hole is enlarged beyond the screw head diameter, the housing cannot securely hold a retrofit kit. Check the reflector (if present) — a dull, oxidized, or peeling reflector reduces light output by 20–40% regardless of the LED source. Scoring threshold: if the average housing score across the facility is ≥ 3.5, retrofit is viable. If < 3.0, replacement is likely more cost-effective when factoring in housing repairs. |
| 2. Energy Savings Delta How much additional energy would a new fixture save vs a retrofit kit? |
The wattage difference between the best retrofit kit and a new equivalent LED fixture: • < 10W difference → retrofit preferred • 10–20W difference → neutral (cost analysis decides) • > 20W difference → replace preferred |
< 15W delta | > 15W delta | Example, HID high bay: a 150W HID retrofit kit (150W system) vs a new 120W LED high bay fixture = 30W delta. At 4,000 hrs/yr and $0.12/kWh, the 30W delta saves an additional $14.40/yr. The new fixture costs ~$80 more than the retrofit kit → additional payback of 5.6 years on the wattage delta alone (beyond the base retrofit payback). If the additional payback exceeds the planned building hold period, retrofit wins. Example, fluorescent troffer: a 40W troffer insert vs a new 35W LED troffer = 5W delta. At 4,000 hrs/yr, the delta saves $2.40/yr, essentially meaningless. Retrofit wins on cost alone. |
| 3. Labor Cost Comparison Which installation method costs less in total labor? |
Total installed labor cost per fixture including: • Retrofit: remove old lamps/ballast, install kit, rewire, test (see Table 1 for hours) • Replace: disconnect old fixture, remove from ceiling/wall, patch/paint surface if needed, mount new fixture, connect, test Compare total labor cost (local rate × hours × crew size). |
Retrofit labor ≤ 60% of replace labor | Retrofit labor > 60% of replace labor | Typical labor ratios: Troffer retrofit vs replace ≈ 35–50% (retrofit is much faster). HID high bay retrofit vs replace ≈ 50–70% (closer, both require lift access). Wall pack retrofit vs replace ≈ 40–55% (retrofit faster because backplate stays). Hidden labor costs of replacement: ceiling tile replacement (broken during fixture removal, $5–$15/tile), drywall patching and painting ($15–$30 per fixture location), disposal of old fixtures ($3–$8 per fixture for recycling), and circuit modification if the new fixture has a different junction box location. |
| 4. Ceiling / Wall Condition Is the mounting surface intact and compatible with fixture replacement? |
5 = Excellent (no cracks, stains, or damage; surface is flat and sound) 4 = Good (minor cosmetic issues, structurally sound) 3 = Fair (some cracking or water staining, no active leaks, surface is stable) 2 = Poor (active leaks, sagging, or cracking, requires repair) 1 = Failed (ceiling/wall requires major repair or replacement before any fixture work) |
Score 3–5 | Score 1–2 | If the ceiling or wall needs repair regardless of lighting work, the marginal cost of fixture replacement (new fixture goes in after the surface is repaired) is lower, the surface repair cost is already sunk. If the surface is in good condition, retrofit avoids disturbing it entirely. Asbestos warning: buildings constructed before 1980 may have asbestos-containing ceiling tiles, drywall joint compound, or spray-on fireproofing. Disturbing these materials during fixture replacement triggers asbestos abatement requirements (OSHA 1926.1101) adding $5–$15/sq ft. If asbestos is suspected, retrofit (which does not disturb the surface) is strongly preferred unless full abatement is already planned. |
| 5. Warranty Consideration What warranty coverage applies to retrofit vs new fixture? |
Retrofit warranty: typically 5 years on the retrofit kit (LED module + driver). The existing housing, sockets, and wiring are NOT covered, they remain the owner’s responsibility. New fixture warranty: typically 5–7 years on the complete luminaire, housing, driver, LED module, lens, and finish are all covered, with a single warranty provider. | 5-year kit warranty acceptable | 7-year full warranty preferred | Warranty gray zone with retrofits: if the existing socket fails 3 years after a Type B tube installation, who pays? The socket is not part of the kit warranty. With a new fixture, the socket/LED connector is covered. For facilities planning 10+ year hold periods, the broader warranty coverage of a new fixture may justify the higher upfront cost. For 3–5 year hold periods, retrofit warranty is sufficient. Kingseng warranty: 5 years on all retrofit kits, 7 years on complete LED luminaires. Extended warranty to 7 years available on retrofit kits at +8% of kit cost. |
| 6. Rebate Eligibility Do utility rebates favor retrofit, replacement, or are they neutral? |
Check your local utility’s commercial lighting rebate program: • Some utilities offer equal rebates for retrofit kits and new fixtures if both are DLC Premium listed. • Some utilities offer higher rebates for new fixtures (classified as “new construction” or “full luminaire replacement”). • Some utilities require the retrofit kit to be installed by a licensed electrician for rebate eligibility. |
Retrofit rebate ≥ 80% of replace rebate | Retrofit rebate < 80% of replace rebate | Typical US rebate landscape (2026): DLC Premium retrofit kits qualify for $5–$15 per kit from most major utilities (ConEd, PG&E, ComEd, Duke Energy, Xcel). DLC Premium new fixtures qualify for $10–$25 per fixture. The $5–$10 rebate differential favoring new fixtures is typically insufficient to overcome the labor and material cost advantage of retrofit. Action: before finalizing the retrofit/replace decision, submit your project to the utility’s rebate pre-approval process, some utilities will provide a binding rebate commitment that locks in the incentive rate. Kingseng provides rebate facilitation support for US projects, including DLC product codes, specification sheets formatted for utility submission, and pre-approval application review. |
Decision Logic: How to Interpret the Six-Factor Score
| 4–6 Factors Favor Retrofit | → RETROFIT. The existing fixtures are suitable candidates. Proceed with retrofit kit specification and procurement. The cost savings (40–60% vs replacement) will be realized with minimal risk. |
| 4–6 Factors Favor Replace | → REPLACE. The existing fixtures are not viable retrofit candidates. Budget full fixture replacement. The additional cost is justified by housing condition, energy savings delta, or ceiling condition requiring remediation anyway. |
| 3/3 Split (Tie) | → Prioritize factors 1 and 3. Housing condition (Factor 1) and labor cost (Factor 3) are the most financially impactful factors. If housing condition scores 4–5 and labor savings are significant (>40%), retrofit. If housing condition scores 2–3 and labor savings are marginal (<30%), replace. If still tied, run a 10-year TCO comparison (see table below) for the specific fixture type. |
NEC and UL Compliance for Retrofit Kits: What Procurement Must Verify
Retrofit kit compliance is not optional, it is a legal requirement with insurance, inspection, and rebate consequences. The three critical standards below form the compliance backbone for LED retrofit kits in North American commercial projects. Every retrofit kit specified in your RFQ must meet these requirements.
| Standard / Code | What It Requires | Why It Matters for B2B Procurement | Procurement Verification |
|---|---|---|---|
| UL 1598C Standard for LED Retrofit Kits |
UL 1598C certifies that an LED retrofit kit, when installed per the manufacturer’s instructions into a specific listed host fixture, produces a complete luminaire meeting all applicable safety standards. Key requirements: (1) the kit must be tested with each host fixture model listed on the certification, (2) the installation must not require modification of the host fixture beyond what is specified in the instructions (no drilling new holes, no cutting housing), (3) a retrofit marking label must be affixed to the host fixture after installation showing the new luminaire certification, (4) the kit must include a wiring diagram and installation instructions, and (5) the completed luminaire must pass dielectric, ground continuity, temperature, and abnormal-condition testing. | (1) Insurance: a fire caused by a non-listed retrofit kit installed in an existing fixture may void the building’s property insurance. Insurers increasingly require proof of UL listing for all lighting modifications during loss control inspections. (2) Electrical inspection: NEC 410.6 requires all luminaires to be listed, a non-UL 1598C retrofit installation is a non-listed luminaire and will fail inspection. (3) Utility rebates: virtually all US and Canadian utility rebate programs require UL 1598C or equivalent (CSA C22.2 No. 250.13) listing. (4) Liability: in the event of an electrical incident, the absence of UL listing shifts liability to the installer and building owner. | In your RFQ, require: “All retrofit kits must be UL 1598C listed. Submit the UL certification file number and a copy of the UL 1598C Listing Card with the quotation. Provide the host fixture compatibility matrix showing which existing fixture models are covered by the UL 1598C listing.” Red flag: a manufacturer that claims “designed to UL 1598C standards” or “UL 1598C compliant” without providing a UL file number is NOT listed, these are marketing claims, not certifications. Only “UL Listed” with a verifiable file number is valid. |
| NEC 410.6 Listing Required for All Luminaires |
NEC Article 410.6 states: “All luminaires, lampholders, and retrofit kits shall be listed.” This is a mandatory requirement, no exceptions. The key 2023 NEC update: “retrofit kits” were explicitly added to the listing requirement, closing a loophole where some contractors argued that a retrofit kit was “components” rather than a “luminaire” and therefore exempt from listing requirements. The 2023 NEC makes it explicit: the retrofit kit itself must be listed, and the completed installation must conform to the listing conditions. | This is the legal enforcement mechanism for UL 1598C. Electrical inspectors in jurisdictions that have adopted NEC 2023 (most US states as of 2026) will check for the retrofit marking label on the host fixture. Missing label = failed inspection = no certificate of occupancy or conditional approval until remediated. For commercial projects, a failed electrical inspection can delay project closeout by 2–4 weeks and incur re-inspection fees ($200–$500 per visit). | Verify in the kit contents: every Kingseng retrofit kit includes a UL 1598C retrofit marking label (self-adhesive, metallic, UV-resistant) that must be affixed to the host fixture after installation. The label includes: the new luminaire model number, date of conversion, electrical ratings, and the UL listing mark. Require in your installation scope: the electrical contractor must affix the retrofit label to every converted fixture and photograph a random sample (5%) for the commissioning report. |
| NEC 410.130(G) Disconnecting Means for Fluorescent Luminaires |
NEC 410.130(G) requires that fluorescent luminaires with double-ended lamps (typical T8/T5) have a simultaneous disconnect of all conductors — both the ungrounded (hot) and grounded (neutral) conductors must be disconnected simultaneously from the ballast when the lamp is removed. This is a safety requirement to prevent electric shock during lamp replacement. When converting to Type B LED tubes (ballast-bypass/direct-wire), the ballast is removed and this section does not directly apply, BUT the existing tombstones (sockets) must be rated for the line voltage now applied to them (typically 120V or 277V). | Practical impact: older fluorescent fixtures (pre-2005, and many pre-2010) may have non-shunted tombstones rated only for ballast voltage (~600V high-frequency starting pulse but NOT continuous 120/277V line voltage). When bypassing the ballast for Type B LED tubes, these tombstones are now exposed to continuous line voltage. If the tombstone insulation is degraded or the tombstone is not line-voltage rated, it can arc and cause a fire. This is the #1 safety concern with Type B installations and the reason some jurisdictions (e.g., California Title 24) require tombstone replacement as part of Type B conversions. | Kingseng includes with every Type B tube order: (1) a tombstone inspection guide, how to visually identify line-voltage-rated vs ballast-only tombstones, (2) replacement non-shunted line-voltage-rated tombstones (2 per tube) at no additional cost, installers are instructed to replace any tombstone that is cracked, discolored, or not marked with a line voltage rating, (3) a wiring label that affixes inside the fixture showing the new wiring configuration and voltage ratings. Specify in your installation scope: “All tombstones shall be replaced with new line-voltage-rated non-shunted tombstones if the existing tombstones are cracked, discolored, or not clearly marked with a voltage rating of 120V or higher.” This eliminates inspector pushback and removes the most common electrical safety risk in Type B retrofits. |
Procurement compliance summary: For all North American projects, require UL 1598C listing with verifiable UL file number, include the retrofit marking label installation in the contractor scope, and specify tombstone replacement for Type B tube installations. Kingseng retrofit kits ship with all required labels, replacement tombstones, and compliance documentation. For complete commercial lighting retrofit planning guidance including electrical code compliance strategy, see our Commercial Lighting Retrofit Guide: Planning, Procurement & Execution.
Labor Factors: The Hidden Costs of Retrofit Installation
Retrofit kit pricing ($18–$120 per kit) tells less than half the cost story. Labor, access equipment, disposal, and operational disruption can easily double or triple the total installed cost, and these factors vary dramatically by fixture height, building type, and environmental conditions. The table below models labor cost factors that procurement professionals must account for when building a retrofit project budget. For more on this topic, read our guide: A Developer’s Guide to Sourcing LED Fixtures for.
| Labor Factor | Cost Impact | Procurement & Planning Mitigation |
|---|---|---|
| Working at Height Ceiling heights above 8 ft requiring lift or scaffold access |
8–12 ft (standard commercial ceiling): 6–8 ft A-frame ladder, no additional equipment cost, no productivity penalty. 12–25 ft (warehouse, gym, big-box retail): scissor lift required. $150–$250/day rental. Productivity: 2–3 fixtures/hr (all work performed at height). Add $30–$60 per fixture for lift rental and operator time. 25–45 ft (high-bay warehouse, manufacturing): boom lift required (articulating or telescopic). $350–$600/day rental. Requires certified operator (OSHA 1926.453). Productivity: 1–1.5 fixtures/hr. Add $75–$150 per fixture. > 45 ft (atrium, arena, stadium): specialized access (scaffolding, motorized platform). $800–$2,000+/day. Productivity: 0.5–1 fixture/hr. Add $200–$500+ per fixture. |
Pre-procurement action: during the facility audit, measure and record the exact mounting height of every fixture (not the ceiling height, fixtures may be suspended below the ceiling). Group fixtures by height zone and calculate lift requirements. Retrofit-as-a-Service: some electrical contractors offer bundled retrofit pricing that includes lift equipment, request per-fixture pricing by height zone rather than separate labor and equipment line items. Kingseng support: Kingseng can recommend locally vetted electrical contractors in major US metro areas who specialize in high-bay retrofit projects and have in-house lift equipment, reducing mobilization costs. |
| Electrical Disconnect Time Time required to safely de-energize, LOTO, and re-energize circuits |
Standard commercial (breaker panel accessible): 5–10 min per circuit (panel walk, LOTO, verification). Small impact per fixture if one circuit feeds 10–20 fixtures. Industrial (remote panels, complex LOTO): 15–30 min per circuit. May require coordination with plant electrician and facility manager. Affected downstream equipment (conveyors, machinery) may be on the same circuit, adds production downtime cost. 24/7 operations (data centers, hospitals, factories): circuits cannot be de-energized during production hours. All work must be done during scheduled shutdown windows (nights, weekends, annual maintenance shutdowns). Adds 25–50% labor premium for off-hours work. |
Circuit mapping before retrofit: during the facility audit, map every fixture to its circuit breaker. Identify which circuits share lighting with critical equipment. For 24/7 facilities, specify hot-swappable retrofit kits (Type A tubes with ballast-compatible design, or screw-in downlight modules that don’t require circuit de-energizing). LOTO (Lockout/Tagout) plan: the electrical contractor must submit a site-specific LOTO procedure before starting work. Kingseng project documentation includes a sample LOTO plan template that contractors can adapt for the specific facility. |
| Old Lamp & Ballast Disposal Environmental compliance for fluorescent lamps and PCB-containing ballasts |
Fluorescent lamp disposal: all fluorescent tubes contain mercury (3–5 mg per 4ft T8 tube) and are classified as Universal Waste under EPA 40 CFR Part 273. Disposal cost: $0.30–$0.60 per 4ft tube through a licensed lamp recycler. Bulk recycling (palletized boxes of 200+ tubes): $0.15–$0.30 per tube. Do NOT dispose in general construction debris, fines range $25,000–$50,000+ per violation under RCRA. PCB ballast disposal: ballasts manufactured before 1979 may contain PCBs in the capacitor. If the ballast label is missing or illegible, or states “No PCBs” but was manufactured before 1998: assume PCB content until tested. PCB ballast disposal cost: $5–$15 per ballast through a TSCA-approved hazardous waste hauler. This can add significant cost to a large project: a 500-fixture facility with 2 ballasts per fixture = 1,000 ballasts. If 30% are PCB = 300 PCB ballasts × $10/ballast = $3,000 in disposal costs. Non-PCB ballasts can be recycled as universal waste: $0.50–$1.50 per ballast. |
Pre-project ballast audit: during the facility walkthrough, open a random sample of fixtures (5–10% of total count, minimum 10 fixtures) and photograph every ballast label. Tally the proportion of PCB-potential ballasts and build the disposal cost into the project budget. Kingseng provides: a ballast dating guide (how to identify pre-1979 vs post-1979 ballasts by manufacturer, label style, and physical characteristics) to help auditors quickly categorize ballasts without removing them. Disposal logistics: specify in the contractor scope that all lamps and ballasts must be containerized, manifested, and recycled through a licensed facility, not landfilled. Require the contractor to provide a Certificate of Recycling as a closeout deliverable. Kingseng can recommend US lamp/ballast recyclers (Cleanlites, Veolia, Waste Management LampTracker) for project-specific disposal planning. |
| Occupied Space Work Premium Additional costs for working in actively occupied commercial spaces |
After-hours work premium: 25–50% labor rate increase for night/weekend shifts. Required when circuits cannot be de-energized during business hours (offices, retail, healthcare). Dust containment: $0.50–$1.50/sq ft for containment barriers, negative air machines, and HEPA vacuums when ceiling work generates dust in occupied spaces. Furniture protection: labor to cover/relocate furniture, IT equipment, and sensitive assets, add 10–20% to per-fixture labor time. Noise restrictions: no power tools during certain hours (hospitals, schools, call centers). Manual tools only, adds 15–25% to installation time. Security escorts: some facilities (data centers, government, airports) require a facility escort for every contractor, add $25–$50/hr for an additional person who does not perform installation work. |
Phased installation strategy: rather than attempting to retrofit the entire facility at once, phase by floor/zone/section. Work in one zone while occupants are temporarily relocated or while that zone is naturally unoccupied (weekends, after 6 PM). This reduces the area requiring containment and protection at any one time. Retrofit advantage: retrofit kits typically require less time per fixture and generate less dust/debris than full fixture replacement, magnifying the labor cost advantage in occupied spaces. Specify in the contractor RFP: require the contractor to submit a phasing plan showing which zones will be retrofitted during which shifts, and how they will protect occupied adjacent zones. Kingseng can share sample phasing plans from previous 50,000+ sq ft retrofit projects. |
Labor rates vary by region, use RSMeans or local contractor quotes for your market. All estimates assume a union or prevailing-wage commercial electrical contractor. For a facility-specific labor cost estimate, send your fixture inventory with mounting heights to simon@ksimpexp.com and Kingseng will provide a labor cost model by height zone.
10-Year TCO Comparison: Retrofit vs New Fixture, 200-Fixture Warehouse Case Study
Total Cost of Ownership (TCO) is the only honest way to compare retrofit versus replacement. First cost tells you what you spend today; TCO tells you what you spend over the holding period including energy, maintenance, and replacement costs. The table below models a 200-fixture warehouse currently illuminated with 320W metal halide high bays (250W lamp + 70W ballast), operating 4,000 hours per year, at $0.12/kWh.
| Cost Category (10-Year Period) | Retrofit: KS-HIDR-150 Kit 150W system per fixture |
Replace: New 120W LED High Bay 120W system per fixture |
Delta Retrofit Advantage |
|---|---|---|---|
| Initial Purchase Cost 200 units × unit price (FOB China, landed US) |
200 × $95 = $19,000 | 200 × $165 = $33,000 | -$14,000 |
| Installation Labor $85/hr electrician, 2-person crew. 25 ft mounting requires scissor lift ($200/day). |
0.75 hrs/fixture × $170/hr crew = $127.50/fixture. Lift: $200/day ÷ 10 fixtures/day = $20/fixture. Total: $147.50 × 200 = $29,500 | 1.5 hrs/fixture (remove old + install new) × $170/hr = $255/fixture. Lift: $200/day ÷ 6 fixtures/day = $33/fixture. Disposal of old fixtures: $8 × 200 = $1,600. Total: ($288 × 200) + $1,600 = $59,200 | -$29,700 |
| 10-Year Energy Cost 200 fixtures × system watts × 4,000 hrs/yr × 10 yrs × $0.12/kWh ÷ 1,000 |
200 × 150W × 40,000 hrs = 1,200,000 kWh. × $0.12 = $144,000 | 200 × 120W × 40,000 hrs = 960,000 kWh. × $0.12 = $115,200 | +$28,800 (retrofit uses more energy) |
| 10-Year Maintenance Driver replacement, lens cleaning, failed unit swap. Assume 3% annual failure rate for retrofit kits (exposed to existing housing heat); 1.5% for new fixtures. |
Driver replacements: 200 × 3% × 10 yrs = 60 driver failures × $35 driver + $75 labor = $6,600. Lens cleaning: $5/fixture × 200 × 2 cleans/10 yrs = $2,000. Total: $8,600 | Driver replacements: 200 × 1.5% × 10 yrs = 30 driver failures × $30 driver (field-replaceable) + $65 labor = $2,850. Lens cleaning: $5/fixture × 200 × 2 cleans = $2,000. Total: $4,850 | +$3,750 |
| End-of-Life Disposal Year 10: decommission and recycle all fixtures |
Retrofit kit removal + existing housing demolition: $15/fixture × 200 = $3,000 | Fixture removal (already separate units): $8/fixture × 200 = $1,600 | +$1,400 |
| Utility Rebate Offset $10/fixture for DLC Premium retrofit kit; $18/fixture for DLC Premium new fixture |
200 × $10 = -$2,000 | 200 × $18 = -$3,600 | +$1,600 |
| 10-Year TCO Summary | Retrofit | Replace | Delta |
|---|---|---|---|
| Total 10-Year Cost | $202,100 | $210,050 | -$7,950 (retrofit saves 3.8%) |
| Cost per Fixture per Year | $101.05 | $105.03 | -$3.98 |
Key takeaway from the 10-year TCO: In this 200-fixture HID warehouse scenario, retrofit wins by ~$8,000 over 10 years, a 3.8% TCO advantage. The retrofit’s massive installation labor advantage ($29,700 savings) and lower first cost ($14,000) outweigh its higher energy consumption ($28,800 penalty) and maintenance costs ($3,750 penalty). However: this conclusion is sensitive to operating hours. At 6,000 hrs/yr (1.5-shift operation), the energy penalty swells to $43,200 and the balance shifts, replacement would win. At 8,760 hrs/yr (24/7), replacement wins decisively. Run this analysis with your actual operating hours, local electricity rate, and labor rate before deciding. Kingseng provides a free TCO comparison tool, email your project parameters to simon@ksimpexp.com for a customized retrofit-vs-replace model.
Kingseng Retrofit Product Portfolio for B2B Procurement
Kingseng, a Shenzhen-based LED manufacturer with 8+ years of export experience, offers a comprehensive range of UL 1598C listed retrofit kits covering the most common commercial and industrial existing fixture types. The product matrix below maps each retrofit kit to its target application, technical specifications, and procurement parameters.
| Retrofit Series | Wattage Range | Key Specifications | Certifications | FOB Unit Price (MOQ 50) | Lead Time | Best Applications |
|---|---|---|---|---|---|---|
| KS-T8A Type A LED Tube |
9W (2ft) 12W (3ft) 18W (4ft) 24W (5ft) |
120–277V universal ballast-compatible. 130 lm/W. CRI 83. Frosted polycarbonate lens. DLC Premium (4ft, 18W). CCT: 3500K/4000K/5000K. 50,000 hr L70. | UL 1598C, ETL, DLC Premium (4ft), RoHS, CE | $4.80 (4ft/18W) | 20–30 days | Quick-turn office retrofits where downtime must be minimized. Tenant improvement projects with short lease terms. Facilities with recently replaced (2019+) electronic ballasts. Not for: facilities with magnetic ballasts, or where ballasts are >8 years old. |
| KS-T8B Type B LED Tube |
9W (2ft) 12W (3ft) 18W (4ft) 24W (5ft) |
120–277V direct wire. 145 lm/W. CRI 83. Double-ended wiring (line one end, neutral other). Frosted lens. DLC Premium (4ft, 18W). Includes replacement tombstones + wiring labels. 50,000 hr L70. | UL 1598C, ETL, DLC Premium (4ft), RoHS, CE | $3.60 (4ft/18W) | 20–30 days | The most popular commercial retrofit tube — ~70% of Kingseng tube volume. Offices, schools, retail, healthcare corridors, parking garages. Best balance of low cost, energy savings, and reliability. Also for: T12 fixtures (magnetic ballast must be bypassed, Type B is the only option). |
| KS-T8C Type C LED Tube |
18W (4ft) per tube External driver: 36W (2-tube) or 72W (4-tube) |
External driver + new non-shunted sockets. 150 lm/W system. CRI 83. 0–10V dimming (standard) or DALI-2 (optional). 0.1%–100% smooth dimming. 60,000 hr L70. Driver field-replaceable. | UL 1598C, ETL, DLC Premium, RoHS, CE. DALI-2 driver: DiiA certified. | $12.00 (4ft/18W tube + driver per 2 tubes) | 25–35 days | Premium commercial projects requiring dimming (conference rooms, classrooms, executive offices). Facilities upgrading to DALI-2 building controls critical for MRI/EEG areas). Best 10-year TCO in dimming applications due to external driver field-replaceability. |
| KS-MSR Magnetic Strip Retrofit |
24W (4ft) 48W (4ft hi-output) 72W (8ft) |
Magnetic mounting, snap-in to steel housing. Integrated driver. 150 lm/W. 120–277V. CRI 83. 0–10V dimming optional. 50,000 hr L70. | UL 1598C, ETL, DLC Premium, RoHS, CE | $18 (4ft/24W) $25 (4ft/48W) $42 (8ft/72W) |
25–35 days | Industrial strip fixtures in warehouses, factories, and workshops. Faster than Type B tubes for strip fixtures (no tombstone rewiring). Vapor-tight strip fixtures: KS-MSR fits inside most vapor-tight housings, verify internal dimensions before ordering. |
| KS-HIDR HID-to-LED Conversion Kit |
100W → 250W MH 150W → 320W MH 200W → 400W MH 240W → 500W MH |
150 lm/W. Universal bracket fits 90%+ HID housings. 120–277V. CRI 83. IP65 option for damp/wet locations. 0–10V dimming optional. 60,000 hr L70. Surge protection: 4kV standard, 10kV optional. | UL 1598C, ETL, DLC Premium, RoHS, CE | $65 (100W) $95 (150W) $120 (200W) $145 (240W) |
25–35 days (30–45 for 10kV option) |
Highest-ROI retrofit category. Warehouses, factories, gymnasiums, big-box retail, convention centers. HID-to-LED conversions deliver 1–1.5 year payback at 4,000+ hrs/yr. Also compatible with: HPS (high-pressure sodium) and MV (mercury vapor) fixtures, same bracket fits. |
| KS-TRI Troffer Retrofit Insert |
30W (2×2) 40W (2×4) 50W (2×4 hi-output) |
Edge-lit PMMA light guide. 135 lm/W. UGR < 19. 120–277V. CRI 83. 0–10V dimming standard. DALI-2 optional. 60,000 hr L70. Drop-in installation, no tools required for grid ceiling. | UL 1598C, ETL, DLC Premium, RoHS, CE | $35 (2×2/30W) $48 (2×4/40W) $58 (2×4/50W) |
25–35 days | Office ceiling grid retrofits, the fastest troffer conversion method. Replaces fluorescent troffer lens/louver assembly with a complete LED panel in 12–20 minutes. Also for: schools, hospitals (corridors and non-sterile areas), retail back-of-house. Not for: parabolic louver troffers where the louver is architecturally specified to remain. |
| KS-DLR Downlight Retrofit Module |
10W (4″) 15W (6″) 20W (6″ hi-output) 30W (8″) |
120 lm/W. CRI 90. Field-selectable CCT: 2700K/3000K/3500K/4000K/5000K. Spring-clip + E26 adapter included. IC-rated. Dimmable (TRIAC/ELV phase-cut). 50,000 hr L70. | UL 1598C, ETL, Energy Star, JA8 (Title 24), RoHS, CE | $8 (4″/10W) $12 (6″/15W) $18 (8″/20W) |
20–30 days | Lobbies, corridors, retail, hospitality, residential common areas. Fastest-payback retrofit for incandescent/halogen downlights (< 1 year). CRI 90 for color-critical retail and hospitality applications. Shallow housing compatible: 2.8″ depth fits 95% of IC and non-IC housings. |
| KS-CNR Canopy / Soffit Upgrade |
40W → 100W HID 60W → 175W HID 80W → 250W HID |
145 lm/W. IP65. Flat lens (Dark Sky compliant, zero uplight). 120–277V. CRI 83. Stainless steel hardware. 60,000 hr L70. IK08 impact rated. | UL 1598C, ETL, DLC Premium, RoHS, CE | $65 (40W) $85 (60W) $110 (80W) |
25–35 days | Gas stations, drive-throughs, parking canopies, building soffits. Outdoor canopy environments, requires careful housing inspection for rust. Dark Sky compliance: flat lens design ensures zero uplight for jurisdictions with outdoor lighting ordinances. |
| KS-WPR Wall Pack Replacement |
30W → 70W HID 50W → 100W HID 80W → 175W HID 120W → 250W HID |
140 lm/W. IP65. IK08 impact rated. 120–277V. CRI 83. Photocell-ready (receptacle included). 0–10V dimming optional. 60,000 hr L70. Stainless steel hinge for tool-less re-lamping access. | UL 1598C, ETL, DLC Premium, RoHS, CE | $55 (30W) $75 (50W) $95 (80W) $125 (120W) |
25–35 days | Building perimeter security lighting, loading docks, walkways, stairwells. Photocell-ready for dusk-to-dawn operation. Procurement tip: order the photocell separately (not integrated) for easy replacement, photocells fail every 3–5 years and are far easier to swap when in an external receptacle. |
| KS-FLR Flood Retrofit Bracket |
50W → 150W HID 100W → 300W HID 150W → 500W HID 200W → 750W HID |
150 lm/W. IP66. Universal knuckle adapter (1/2″ NPS). Includes safety cable. 120–277V. CRI 83. 0–10V dimming optional. 60,000 hr L70. IK08 impact rated. | UL 1598C, ETL, DLC Premium, RoHS, CE | $65 (50W) $110 (100W) $145 (150W) $190 (200W) |
25–35 days | Building façade lighting, parking lot perimeter, signage illumination, security floodlighting. Bracket compatibility: fits standard 1/2″ NPS knuckle mounts (95% of installed floodlight arms). Adapter plates available for non-standard mounts, provide photos and measurements of the existing mount for Kingseng to confirm compatibility before ordering. |
All prices FOB Shenzhen, MOQ 50 units per model. Sea freight (4–6 weeks) or air freight (5–7 days, +300–400% freight cost). UL/ETL certification valid for North America. CE/RoHS valid for EU/UK/MEA/SEA markets. Kingseng maintains US-stock inventory on KS-T8B (4ft/18W) and KS-DLR (6″/15W) — 3–5 day delivery to US destinations for stocked items. Contact simon@ksimpexp.com for a customized quotation based on your fixture inventory and project location.
B2B Procurement Checklist: 8 Steps to a Successful Retrofit Kit Project
Use this 8-step checklist when planning an LED retrofit kit procurement. Each step addresses a decision point that, if skipped, leads to compliance failures, budget overruns, or post-installation performance issues.
- ☐ Complete a fixture-by-fixture facility audit before ordering. Walk the entire facility and record: fixture type, count, lamp type/wattage, ballast type (electronic vs magnetic, and age), mounting height, circuit number, housing condition (score 1–5), operating hours/day, and criticality (can this zone be shut down during business hours?). Use a standardized audit spreadsheet, Kingseng provides a free facility audit template (Excel format) that maps directly to the retrofit kit selection matrix. Do NOT estimate from building plans — actual installed fixtures frequently differ from as-built drawings by 10–30% due to renovations and ad-hoc changes over the decades.
- ☐ Run the retrofit-vs-replace decision tree on every fixture type. For each distinct fixture type in your facility, score the six decision factors (housing condition, energy savings delta, labor cost comparison, ceiling/wall condition, warranty consideration, rebate eligibility). If 4+ factors favor retrofit, proceed with kit selection. If 4+ factors favor replacement, budget full fixture replacement for that fixture type. Mixed recommendations? Prioritize factor 1 (housing condition) and factor 3 (labor cost). Document the scoring for every fixture type, this provides defensible decision rationale for stakeholders and auditors.
- ☐ Require UL 1598C listing with verifiable UL file number in your RFQ. “UL 1598C compliant” and “designed to UL 1598C standards” are marketing language, not certifications. Only “UL Listed” with a verifiable file number is genuine. Check the UL file number on UL’s Online Certifications Directory (productiq.ul.com). Red flag test: if the manufacturer cannot provide a UL file number within 24 hours of request, the kit is not listed. Eliminate non-listed kits from consideration, the compliance, insurance, and rebate risks are too high for any commercial project.
- ☐ Model the 10-year TCO with your actual operating parameters. The TCO model above used a 200-fixture warehouse at $0.12/kWh and 4,000 hrs/yr. Your facility has different numbers. Calculate: initial purchase cost, installation labor (get a local contractor quote, don’t use national averages), 10-year energy cost (your actual rate and operating hours), 10-year maintenance (manufacturer failure rate × your labor rate), and disposal cost. Include utility rebates (submit for pre-approval before ordering). If the TCO difference is < 10%: the decision is not financially decisive, let operational factors (downtime tolerance, warranty coverage, aesthetic preference) drive the final choice. Kingseng provides a free TCO calculator template.
- ☐ Order a sample kit and test-install it before placing the full order. Every retrofit kit claims “universal fit” or “compatible with most fixtures.” Test that claim. Order 2–3 sample kits of each type you plan to use. Have your electrical contractor install them in the actual existing fixtures in your facility. Document: (1) does the kit physically fit without modification?, (2) does the wiring diagram match the actual fixture wiring?, (3) does the completed installation look professional (no gaps, loose parts, exposed wiring)?, (4) does the light output and distribution match your expectations? Sample testing typically takes 1–2 days and costs $500–$1,000 in contractor time — this is the cheapest insurance against a $20,000+ installation rework. Kingseng ships sample kits within 3–5 days via air freight (at cost) for qualified projects.
- ☐ Include all disposal costs in the project budget. Fluorescent lamp recycling ($0.30–$0.60/tube), non-PCB ballast recycling ($0.50–$1.50/ballast), and PCB ballast hazardous waste disposal ($5–$15/ballast) can add 5–15% to the total project cost. Audit ballast types during the facility walkthrough (photograph labels on a sample of fixtures). Budget disposal as a separate line item in the contractor scope, not lumped into “installation.” Require a Certificate of Recycling from the contractor as a closeout deliverable. This protects the building owner from RCRA liability.
- ☐ Specify the retrofit marking label installation in the contractor scope. UL 1598C requires that a retrofit marking label be affixed to every converted fixture. Include this in the contractor scope of work as a line item: “Affix UL 1598C retrofit marking label (provided with each kit) to the interior of each converted fixture in a visible location. Photograph a random sample of 5% of converted fixtures showing the label and include photos in the commissioning report.” If the inspector opens a random fixture and finds no label, the entire project can be red-tagged. Kingseng retrofit kits include self-adhesive metallic UV-resistant labels.
- ☐ Plan for the unexpected, budget a 10% contingency. Retrofit projects uncover surprises: asbestos-containing ceiling tiles requiring abatement, corroded fixture housings that crumble when the ballast is removed, circuits that don’t match the panel schedule, ballasts that tested “No PCBs” but the label is suspicious. A 10% contingency (on the total installed cost) is standard for commercial retrofit projects. If not used, it returns to the budget. If needed, it prevents a change order that delays the project by 2–4 weeks while approvals are obtained. Procurement tip: Kingseng can hold an additional 5–10% of kit inventory at the factory for 60 days after order shipment, if you discover damaged housings that force a switch from retrofit to replacement for some fixtures, the contingency kits are available for immediate air-freight without a new production run.
Next steps for B2B procurement professionals: For a customized retrofit kit specification matched to your facility’s existing fixture inventory, including a retrofit-vs-replace decision analysis, 10-year TCO model, and FOB quotation for Kingseng retrofit kits, contact Simon Chen at simon@ksimpexp.com. Include your facility audit spreadsheet or fixture schedule, project location, and desired timeline for a response within 2 business days.
Explore related resources:
- LED High Bay Lights for Warehouse & Industrial Facilities — Full fixture replacement option for HID high bay conversions with integrated sensors and controls.
- LED Panel Lights for Commercial Offices & Retail — New fixture specification for commercial troffer and panel applications with DALI-2 dimming options.
- Commercial Lighting Retrofit Guide: Planning, Procurement & Execution — End-to-end retrofit project management: facility audit methodology, rebate strategy, contractor selection, installation phasing, and post-installation measurement & verification.
For a customized LED retrofit kit specification, retrofit-vs-replace TCO analysis, and OEM quotation for Kingseng UL 1598C listed retrofit products, contact Simon Chen at simon@ksimpexp.com
Last Updated: June 2026. All pricing indicative FOB Shenzhen, MOQ 50+ units unless otherwise specified. Specifications verified against UL 1598C, NEC 2023, EPA 40 CFR Part 273 (Universal Waste), EPA 40 CFR Part 761 (PCB/TSCA), and DLC Technical Requirements V5.1 current as of publication date. This guide is intended for B2B procurement professionals sourcing LED retrofit kits from Chinese manufacturers for commercial and industrial projects. No competitor brands referenced. Energy savings calculations assume standard operating conditions, actual results vary by facility.