Warehouse Lighting Layout Calculation — Step-by-Step Guide (2026)

Published: July 13, 2026 | Author: Simon Chen, Senior LED Supply Chain Expert | Category: LED Technology

Quick Answer

Key Takeaways

• Fixture spacing is driven by the spacing-to-height ratio (SHR) from the IES file, not by a rule of thumb. Always request the IES photometric file from your supplier before doing layout math.
• A 10,000 sq ft warehouse at 25 ft mounting height needs roughly 18–25 fixtures for general storage (150 lux) and 30–40 for picking/packing zones (300 lux) , use these as RFQ benchmarks, not final counts.
• Grid layout works for open-plan warehouses; staggered layout improves uniformity; aisle lighting needs separate calculation because racking reduces effective mounting height.
• Manual lumen-method calculation gets you a budget estimate. DIALux or Relux simulation gets you the correct fixture count , and typically reduces it by 10–15% while improving uniformity.
• The top procurement mistake is accepting a supplier’s layout without independent IES-based verification , suppliers optimize for minimum fixture count, not lighting quality.

Key Definitions

Lux (lx)

The SI unit of illuminance , lumens per square meter (lm/m²). One lux equals one lumen spread evenly over one square meter. Warehouse applications range from 100 lux (aisles, low-activity storage) to 500 lux (inspection, assembly). In imperial units: 1 foot-candle (fc) = 10.764 lux. A quick conversion: 20 fc ≈ 215 lux; 30 fc ≈ 323 lux.

Lumen (lm)

The total visible light output from a source, weighted by the human eye’s spectral sensitivity (photopic curve). A 150W LED high bay at 150 lm/W produces 22,500 lumens. Lumens describe total output , lux describes how much reaches the surface. Two 22,500-lumen fixtures with different beam angles produce different lux levels at the floor.

Mounting Height (MH)

The vertical distance from the luminaire to the work plane (typically the floor for warehouses, or 2.5 ft above the floor for task areas). For layout calculations, use mounting height above the work plane, not the ceiling height. If fixtures hang 3 ft below a 30 ft ceiling and the work plane is at 2.5 ft, MH = 30 – 3 – 2.5 = 24.5 ft.

Spacing-to-Height Ratio (SHR / S/MH)

The maximum center-to-center fixture spacing divided by mounting height that maintains acceptable uniformity. Listed in every IES photometric file as two values: parallel and perpendicular to the luminaire’s primary axis. Always use the lower value for conservative layout planning. Typical ranges: 0.5–0.8 (narrow beam), 0.8–1.0 (medium beam), 1.0–1.3 (wide beam), 1.3–1.5 (very wide beam).

Uniformity Ratio (U₀)

The ratio of minimum illuminance to average illuminance across the work plane (U₀ = E_min ÷ E_avg). EN 12464-1 requires U₀ ≥ 0.4 for storage areas and ≥ 0.6 for task areas. A low uniformity ratio means dark spots , the most common layout failure. U₀ is verified in DIALux or Relux simulation, not in manual calculation.

Wattage Efficacy (lm/W)

System-level lumens per watt, including driver losses. A fixture producing 22,500 lumens at 150W has 150 lm/W efficacy. Every 10 lm/W improvement reduces energy cost by roughly 7% over the fixture’s lifetime. In 2026, 150 lm/W is the B2B procurement baseline for industrial LED high bays; premium fixtures reach 170–190 lm/W.

Why Layout Matters More Than Wattage

B2B buyers sourcing LED high bay lights from China often focus obsessively on wattage and lumens , but the layout determines whether those lumens actually reach the work plane. A well-planned layout with 150W fixtures delivers better real-world illumination than a haphazard layout with 200W fixtures. Here’s why: light intensity drops with the square of distance (inverse square law). A fixture mounted at 30 ft delivers only 25% as much light to the floor as one mounted at 15 ft, all else equal. Layout , specifically fixture spacing and mounting height relative to beam angle , controls whether the light pools overlap correctly at the floor level.

This also affects your procurement budget directly. Going from a poorly spaced layout to an optimized one typically reduces fixture count by 10–20% for the same lux target. On a 50,000 sq ft warehouse, that's 10–20 fewer fixtures, 10–20 fewer installation points, and 10–20 fewer drivers to maintain over a decade of operation. The layout isn't just a lighting design exercise , it is a cost-optimization strategy.

The three numbers that drive every layout decision: (1) target lux at the work plane, (2) mounting height above the work plane, and (3) the fixture’s spacing-to-height ratio from its IES file. Everything else , grid pattern, fixture count, row spacing , derives from these three inputs.

Step-by-Step Layout Calculation

This five-step process takes you from a blank floor plan to a fixture count you can take to your RFQ. Each step builds on the previous one , skip a step and your count will be off.

Step 1: Map the Floor Plan

Measure the warehouse dimensions (length × width in feet or meters). Mark the location of every racking row, structural column, conveyor belt, mezzanine, and wall. Note ceiling height and whether fixtures will be surface-mounted or suspended. If fixtures hang below the ceiling, subtract the suspension drop from the ceiling height to get actual mounting height. Identify zones that need different lux levels: aisle vs. open storage vs. packing vs. inspection. Each zone gets its own calculation , one number for an entire warehouse is a procurement red flag.

Step 2: Set the Lux Target for Each Zone

Use these industry-standard targets per EN 12464-1 and IESNA RP-20-14: aisles and walkways 100–150 lux; low-activity bulk storage 100–150 lux; medium-activity storage with occasional reading 200 lux; picking, packing, and sorting 200–300 lux; loading docks 150–200 lux; quality inspection and assembly 300–500 lux. If your warehouse is multi-purpose, create a zone matrix: Zone A (storage) = 150 lux, Zone B (picking) = 250 lux, Zone C (inspection) = 400 lux. This zone matrix determines whether you can use a single fixture model across the facility or need different wattages per zone.

Step 3: Get the Fixture’s Real Lumen Output and SHR

Request the IES LM-79 photometric report from your supplier. Extract three numbers: (a) total fixture lumens at the CCT you're specifying, (b) the spacing criterion (SHR) , two values, parallel and perpendicular, and (c) the beam angle at 50% intensity. Don’t use the supplier’s catalog lumen number , the LM-79 report is the independently tested value. Also apply a light loss factor (LLF) of 0.75–0.80 to account for lumen depreciation over time (L70), dirt accumulation, and driver aging. Effective lumens = LM-79 lumens × LLF.

Step 4: Calculate the Grid Layout

Use the spacing formula: Maximum Spacing = SHR × Mounting Height. Take the lower of the two SHR values for safety. For a fixture with SHR 1.2 at 25 ft mounting height: max spacing = 1.2 × 25 = 30 ft. Calculate coverage per fixture: Spacing² (for square grid). Coverage = 30 × 30 = 900 sq ft. Number of fixtures = Zone Area ÷ Coverage per Fixture. Add 10–15% for edges, column obstructions, and uniformity. Example: 10,000 sq ft ÷ 900 = 11.1, round up to 12, add 15% = 14 fixtures. This is your manual estimate.

Step 5: Verify Uniformity in DIALux or Relux

Import the supplier’s IES file into DIALux (free) or Relux (free). Model the actual floor plan with racking, columns, and walls using correct reflectance values (ceiling 0.7, walls 0.5, floor 0.2 for typical warehouses). Run the simulation and check the uniformity ratio (U₀ = E_min ÷ E_avg). If U₀ is below 0.4 (storage) or 0.6 (task areas), tighten the spacing , reduce spacing in 10% increments and re-simulate. The simulation often reveals that you need 10–20% more fixtures than the manual calculation predicted, or occasionally fewer fixtures with adjusted placement. Never skip this step , it's the difference between a warehouse that looks well-lit on paper and one that actually is.

The Spacing Formula: Spacing = SHR × Mounting Height

This single formula drives the entire layout calculation. It’s deceptively simple , but every variable has procurement implications that B2B buyers need to understand.

SHR (Spacing-to-Height Ratio) isn't a generic number. It comes exclusively from the IES photometric file of the specific fixture model, wattage, and beam angle you're buying. If a supplier can't provide the IES file, you can't calculate a verified layout. The IES file contains two SHR values , one for the direction parallel to the luminaire’s long axis (for linear fixtures) or primary distribution plane, and one perpendicular. For UFO-style fixtures with symmetrical distribution, the two values are usually close. For linear fixtures, they can differ by 30–50%. Always use the lower of the two values to ensure uniform coverage in both directions.

Mounting Height (MH) is measured from the fixture to the work plane, not from the ceiling to the floor. A fixture suspended 4 ft below a 30 ft ceiling has a mounting height of 26 ft to the floor , not 30. If the work plane is a 3 ft high table, MH = ceiling height – suspension drop – work plane height = 30 – 4 – 3 = 23 ft. This distinction matters: using ceiling height instead of mounting height overestimates spacing by 15–25%, which leads to dark spots.

Real-world example: A UFO high bay with SHR 1.2 (from IES file) at 26 ft mounting height gives maximum spacing of 31.2 ft. If instead you mistakenly used ceiling height (30 ft), you would calculate spacing of 36 ft , a 15% over-estimate that produces visible dark gaps between fixture pools at floor level.

Layout Pattern Reference Table

Note: Values assume a 60° beam angle except where noted, light loss factor of 0.8, and an open warehouse layout without racking. Fixture counts for aisles and racked zones are 20–50% higher. Always verify with a DIALux simulation using your specific IES file and floor plan.

Different Layout Patterns: Grid, Staggered, and Perimeter

The layout pattern you pick affects both uniformity and fixture count. There are three main patterns for warehouse lighting , and they aren't interchangeable.

Grid Layout (Square or Rectangular)

The default for open-plan warehouses. Fixtures form evenly spaced rows and columns. Spacing is uniform in both directions (square grid) or wider in one direction if the IES file permits (rectangular grid). Grid layout is simplest to install , rows follow structural bay lines , and produces predictable, symmetrical illumination. Use grid layout when: the floor plan is rectangular without major obstructions, racking rows are parallel to fixture rows, and the ceiling structure supports uniform row spacing.

Staggered Layout (Diamond Pattern)

Every other row of fixtures is offset by half the fixture spacing. This breaks up the regular grid and fills in the darker zones at the midpoint between four adjacent fixtures. Staggered layout improves uniformity ratio by 5–10% at the same spacing, or lets you increase spacing by 5–10% while maintaining the same uniformity. Use staggered layout when: uniformity requirements are strict (U₀ ≥ 0.6), ceiling height exceeds 25 ft where beam overlap is critical, or racking heights vary across the floor , the staggered pattern smooths out illumination irregularities.

Perimeter Layout

Fixtures are placed closer to walls , typically at 50–70% of the standard row spacing from the wall , with wider spacing in the center of the facility. This compensates for the fact that walls don't reflect light back into the space (especially in warehouses with dark or unfinished walls). Without perimeter compensation, the edges of the warehouse are 30–50% dimmer than the center. The formula: first row distance from wall = 0.5 × fixture spacing (for light-colored walls) or 0.3 × fixture spacing (for dark/unfinished walls). This adds fixtures along the perimeter but eliminates dark wall zones that are a safety and productivity issue.

Aisle Lighting , A Special Case

Warehouse aisles between tall racking break the standard layout rules. The racking itself blocks light, creating shadow canyons that standard grid layout doesn't address. Here’s how aisle calculation differs from open-area calculation.

First, the effective mounting height changes. Light from a fixture at 30 ft must reach the floor through a 10 ft wide gap between two 22 ft tall rack rows. The fixture’s beam hits the rack tops first , anything above the rack top line is wasted. For aisle calculation, effective mounting height = fixture height – racking height. At 30 ft fixture height with 22 ft racking: effective MH = 8 ft. This dramatically tightens required spacing.

Second, fixture type matters. For narrow aisles (6–10 ft wide), linear high bay fixtures mounted parallel to the aisle centerline deliver better vertical illuminance on rack faces than UFO fixtures. The linear fixture’s elongated beam pattern throws light along the aisle length rather than wasting it on the narrow cross-aisle dimension. For aisles wider than 12 ft, either UFO or linear fixtures work , the deciding factor becomes aisle length and rack face illumination needs.

Aisle fixture count formula: Number of fixtures = Aisle Length ÷ (SHR × Effective Mounting Height). Example: 200 ft aisle, SHR 1.0, effective MH 8 ft = spacing 8 ft, 200 ÷ 8 = 25 fixtures per row. For double-sided racking with fixtures centered over the aisle, this is the total count. For single-sided racking, you may need fixtures offset toward the rack face.

Use narrow-beam optics (25–38°) for aisles to punch light down the narrow corridor without spilling onto rack tops. Wide-beam fixtures in aisles waste 40–60% of their output on rack roofs , lumens that never reach the floor or rack face where workers need them.

Common Layout Mistakes

After reviewing layouts from dozens of B2B procurement projects, these are the mistakes that show up again and again , and what they cost.

Mistake 1: Trusting the supplier’s layout without IES verification. A European logistics company ordered 200 LED high bays for a 60,000 sq ft DC based on the Chinese supplier’s in-house layout. The supplier used a generic 1.5 SHR (the fixture’s actual SHR from the LM-79 report was 1.05). Result: spacing was 40% too wide, average lux was 40% below target, and the uniformity ratio was 0.23 instead of the required 0.4. The fix required 90 additional fixtures , a $34,000 unbudgeted cost plus re-installation labor. The buyer now requires an IES file and independent DIALux verification for every order.

Mistake 2: Using the same spacing for the entire warehouse. A distribution center with 30 ft open-bay ceilings and 20 ft racking zone ceilings received a single layout using 30 ft ceiling height throughout. In the racking zone, fixtures spaced at 36 ft (1.2 × 30) left aisles with effective spacing gaps of 12 ft , the racking blocked so much light that workers used headlamps to read shelf labels. Solution: calculate open zones and aisle zones separately, then merge layouts with staggered transitions at zone boundaries.

Mistake 3: Ignoring the light loss factor. New LED fixtures produce 100% of rated lumens, but after 20,000 hours of operation with warehouse dust accumulation, real-world output drops to 70–80% of initial. Layouts calculated at 100% initial lumens look great on day one but fail to meet lux targets within 2–3 years. Always apply LLF of 0.75–0.80 to the LM-79 lumen value before calculating spacing. This adds 10–20% to fixture count but ensures the warehouse meets spec for the full maintenance cycle.

Mistake 4: Forgetting the walls. Light doesn't bounce off dark, unfinished warehouse walls the way it does off painted office walls. A layout calculated with 0.5 wall reflectance (standard assumption in many calculators) in a warehouse with bare concrete block walls (actual reflectance 0.2–0.3) produces edge zones that are 30–50% dimmer than the center. The fix: either add perimeter-row fixtures at 0.3–0.5× standard spacing from walls, or set wall reflectance to 0.2 in your DIALux model and let the software adjust spacing automatically.

Software Tools vs Manual Calculation

For B2B procurement, the question isn't whether to use software , it's when to switch from manual calculation to software simulation. Here’s the decision framework.

Manual calculation (lumen method) is adequate for: budget-stage estimates before you have selected a specific fixture model; quick RFQ benchmarks when you need to compare 3–5 supplier quotes; rectangular open-plan warehouses without racking or major obstructions; projects under 5,000 sq ft where a few extra fixtures won't break the budget. The lumen method formula: Number of Fixtures = (Target Lux × Floor Area in m²) ÷ (Fixture Lumens × Utilization Factor × Light Loss Factor). The utilization factor (UF) is the weak point , it requires a room index calculation and lookup tables that assume open, unobstructed spaces. In a racked warehouse, the actual UF can be 30–50% lower than tabulated values.

DIALux or Relux simulation is required for: any warehouse with racking, mezzanines, or irregular floor plans; projects over 10,000 sq ft where fixture count errors are expensive; any facility requiring verified uniformity ratios for compliance; multi-zone warehouses with different ceiling heights or lux targets; and final procurement decisions. Both DIALux (by DIAL GmbH) and Relux (by Relux Informatik AG) are free, support IES file import, and generate standardized reports suitable for tender documentation. Most established LED suppliers , including Kingseng , provide IES files on request and can run simulations for you if you supply a floor plan.

The B2B procurement workflow: (1) Use manual calculation for your initial RFQ to get budget pricing from 3–5 suppliers. (2) Narrow to 1–2 suppliers and request IES files for their proposed fixture models. (3) Run DIALux simulations with your actual floor plan. (4) Compare simulated fixture counts against supplier recommendations , the gap tells you whether the supplier is optimizing for your lighting quality or their sales volume. (5) Only then issue the purchase order.

Standards & References

• EN 12464-1:2021 , Light and lighting , Lighting of work places , Part 1: Indoor work places. The European standard specifying illuminance levels, uniformity ratios, and glare limits for industrial and warehouse environments.
• IESNA RP-20-14 , Recommended Practice for Lighting Industrial Facilities. The Illuminating Engineering Society of North America’s complete standard covering warehouse, manufacturing, and industrial lighting design.
• CIBSE SLL Lighting Handbook , The Society of Light and Lighting’s reference handbook, providing detailed application guidance for industrial lighting including spacing criteria and maintenance factors.
• IES LM-79-19 , Approved Method: Optical and Electrical Measurements of Solid-State Lighting Products. The standard governing photometric testing of LED luminaires , the source of the IES file your layout depends on.
• IES LM-80 / TM-21 , Measuring Luminous Flux and Color Maintenance of LED Packages / Projecting Long-Term Lumen Maintenance. These standards underpin the L70 lifetime rating and the light loss factor used in layout calculations.

Layout Planning Checklist

• Floor plan ready: Accurate dimensions (L × W), racking layout, column positions, mezzanine locations, door and dock positions.
• Mounting height calculated: Ceiling height minus suspension drop minus work plane height. One value per zone if heights vary.
• Lux targets set per zone: Storage, picking, inspection, docks, offices , each with a target lux and minimum uniformity ratio.
• IES photometric file obtained: From your shortlisted supplier, for the exact fixture model, wattage, CCT, and beam angle you plan to order.
• SHR values extracted: Both parallel and perpendicular SHR from the IES file. Using the lower value for conservative spacing.
• Light loss factor applied: 0.75–0.80 multiplier on LM-79 lumens to account for depreciation and dirt.
• Layout pattern selected: Grid for open zones, staggered for mixed-height areas, perimeter compensation for wall zones.
• Aisle lighting calculated separately: Using effective mounting height (fixture height minus racking height) and narrower beam angles (25–38°).
• DIALux or Relux simulation run: With correct wall/ceiling/floor reflectance and all obstructions modeled.
• Uniformity verified: U₀ ≥ 0.4 for storage, ≥ 0.6 for task zones. Spacing adjusted if uniformity fails.
• Fixture count finalized: Simulation-verified count, not supplier’s default recommendation.
• Wattage selectability checked: If multi-zone facility, confirmed fixtures have field-selectable wattage to reduce SKU count.

FAQ

How many LED high bay lights does a 10,000 sq ft warehouse need?

A 10,000 sq ft warehouse typically needs 20–40 LED high bay lights at 150–240W each, depending on ceiling height and your lux target. For a 25 ft ceiling with a 200 lux target: using 150W fixtures (22,500 lumens each at 150 lm/W) with a 60° beam angle and 1.2 spacing-to-mounting-height ratio, fixture spacing is 30 ft, coverage per fixture is 900 sq ft, so 11–12 fixtures are needed in an open layout , but with edge overlap, racking obstructions, and uniformity requirements, the real-world count is 18–25. For narrower 90° beams at lower mounting heights (15–20 ft), count increases to 30–40. Always request an IES photometric file from your supplier and run a DIALux simulation before finalizing quantities. Kingseng provides IES files for all industrial high bay fixtures on request at no charge.

What is the spacing-to-mounting-height ratio (SHR) and how do I use it?

SHR (also called spacing criterion or S/MH) is the ratio of the maximum center-to-center distance between fixtures divided by the mounting height above the work plane. It’s the single most important number for layout calculations. For example, if a fixture’s SHR is 1.2 and your mounting height is 25 ft, maximum fixture spacing is 1.2 × 25 = 30 ft. SHR values are found in the IES photometric file , never use generic values. Typical SHR ranges: 0.5–0.8 for narrow-beam (15–30°) fixtures; 0.8–1.0 for medium-beam (30–50°) fixtures; 1.0–1.3 for wide-beam (50–90°) fixtures; and 1.3–1.5 for very wide-beam (90–120°) fixtures. Always use the lower of the two SHR values (parallel and perpendicular) from the IES file for conservative layout planning.

Should I use grid layout or staggered layout for my warehouse high bay lights?

Grid (square/rectangular) layout is the default for open-plan warehouses with uniform racking , fixtures form evenly spaced rows and columns, producing predictable, symmetrical illumination. Staggered (diamond) layout offsets every other row by half the fixture spacing, reducing dark spots at fixture boundaries and improving uniformity ratio by 5–10%. Use grid layout when aisles run parallel to fixture rows and racking is at least 4 ft below the fixtures. Use staggered layout when you need maximum uniformity in open processing zones or when racking heights vary significantly across the floor. For warehouses with both open areas and racking aisles, run grid in the aisles and staggered in the open zones , the layout pattern isn't an all-or-nothing decision. Kingseng’s application engineers can generate both grid and staggered layout options from a single floor plan at no cost.

What lux level do I need for different warehouse zones?

Following EN 12464-1 and IESNA RP-20-14 standards: aisles and walkways need 100–150 lux; general storage areas (low-activity) need 100–150 lux; medium-activity storage and packing need 200 lux; picking and sorting zones need 200–300 lux; loading docks need 150–200 lux; quality inspection and assembly areas need 300–500 lux; office areas within the warehouse need 300–500 lux. The uniformity ratio (minimum lux ÷ average lux) should be at least 0.4 for storage areas and 0.6 for task areas. Always factor in a light loss factor (LLF) of 0.7–0.8 to account for lumen depreciation, dirt accumulation, and driver aging over the fixture’s lifetime.

Do I need DIALux software to plan my warehouse lighting layout, or can I calculate it manually?

Manual calculation using the lumen method (total lumens = target lux × area ÷ utilization factor ÷ light loss factor) gives you a rough fixture count for budgeting and RFQ purposes. But for final procurement, a DIALux or Relux simulation is strongly recommended , it accounts for racking shadows, column obstructions, wall reflectance, and non-rectangular floor plans that manual formulas can't handle. A competent DIALux simulation typically reduces fixture count by 10–15% versus manual calculation while improving uniformity. Both DIALux and Relux are free software. Most established LED suppliers , including Kingseng , provide IES files and can run the DIALux simulation for you if you supply a DWG or PDF floor plan with racking layout.

How do I handle aisle lighting differently from open-area lighting in my layout calculation?

Aisle lighting requires separate calculation because the narrow geometry changes the fixture’s effective coverage. For aisles between tall racking (6–10 ft wide, racking 15+ ft tall), use linear high bay fixtures mounted parallel to the aisle centerline with narrow-beam optics (25–38°). The spacing formula changes: fixture spacing = SHR × (mounting height minus racking height). For example, if fixtures are at 30 ft and racking tops are at 22 ft, effective mounting height for aisle calculation is only 8 ft above the racking plane , this dramatically tightens spacing. In narrow aisles, calculate fixture count as: aisle length ÷ (SHR × effective mounting height), then round up. Aisle fixtures typically run at 20–50% of open-area fixture wattage. Always model aisles separately in DIALux , overlapping aisle and open-area calculations produces inaccurate fixture counts.

What is the most common layout mistake B2B buyers make when importing LED high bay lights from China?

The most common mistake , and the most expensive to fix , is accepting the supplier’s default layout recommendation without independent verification. Chinese suppliers typically optimize for minimum fixture count (to make their quote appear cheaper), not for lighting quality. This produces layouts with excessive spacing that meet the arithmetic average lux target but fail uniformity requirements, leaving dark zones between fixtures. Three specific red flags: (1) the supplier provides a layout without asking for your racking plan , racking shadows are the #1 cause of poor real-world uniformity; (2) the spacing exceeds 1.5× mounting height , this almost always fails IESNA uniformity standards; (3) the supplier can't or won't provide the IES photometric file , without it, no simulation software can verify the layout. Always run the supplier’s IES file through DIALux yourself (or have a third party do it) using your actual floor plan including racking, columns, and wall positions.

Related Questions

• How to calculate LED high bay light spacing using IES photometric data
• Warehouse LED lighting lux requirements per zone , storage vs picking vs inspection
• Grid vs staggered lighting layout for industrial facilities comparison
• DIALux vs Relux for warehouse lighting simulation , which is better for B2B procurement
• Narrow aisle warehouse lighting calculation , effective mounting height formula
• How to read an IES photometric file for LED high bay layout planning

Related: Best LED High Bay Lights 2026 Guide | LED Beam Angle Guide | What is CRI in Lighting | Chinese LED Factory Audit Checklist | LED Installation Cost Guide

This guide is part of the Kingseng technical documentation series for B2B lighting procurement professionals. Kingseng is an ISO 9001-certified LED high bay manufacturer based in Shenzhen, China, with 2,500 sqm production capacity and 500,000+ units annual output. For IES photometric files, DIALux layout support, or RFQ assistance, contact our engineering team through the Kingseng industrial lighting portal. Layout methodology verified against EN 12464-1, IESNA RP-20-14, and CIBSE SLL Lighting Handbook standards.