- What Is LM80 Certification?
- L70 vs L80 vs L90: Understanding Lumen Maintenance
- How LM80 Data Affects Your Warranty
- Kingseng LM80 Testing Standards
What Is LM80 Certification?
LM80 is the IES (Illuminating Engineering Society) standard for measuring LED lumen depreciation over time. Unlike simple “50,000 hour” claims, LM80 provides verifiable test data showing exactly how much light output degrades at specific operating temperatures. For B2B buyers, LM80 data is the foundation of warranty claims and ROI calculations.
L70 vs L80 vs L90: Understanding Lumen Maintenance
| Rating | Definition | Typical Hours | Application |
|---|---|---|---|
| L90 | 90% of initial lumens remain | 15,000-25,000 hrs | Retail, museum, color-critical displays |
| L80 | 80% of initial lumens remain | 30,000-50,000 hrs | Office, hospitality, healthcare |
| L70 | 70% of initial lumens remain | 50,000-100,000 hrs | Warehouse, industrial, street lighting |
L70 is the industry standard: when a fixture reaches L70, it is considered “end of useful life” and should be replaced. However, many commercial environments require higher maintenance levels, retail stores may specify L80 to maintain consistent merchandise presentation, while museums may require L90 to protect light-sensitive exhibits.
How LM80 Data Affects Your Warranty
A legitimate LED warranty references LM80 test data. Kingseng warranties are based on TM-21 projections derived from LM80 test reports: (1) LM80 provides 6,000-10,000 hours of actual test data, (2) TM-21 projects that data to estimate L70/L80/L90 lifetimes, (3) The warranty covers lumen output to the TM-21 projected level. Beware of suppliers claiming 100,000-hour lifetimes without providing LM80 test reports, these claims are unverifiable.
Kingseng LM80 Testing Standards
Kingseng tests LED modules at three case temperatures (55°C, 85°C, and a third manufacturer-specified temperature) per IES LM-80-20 methodology. Test duration: minimum 6,000 hours with data collected every 1,000 hours. Reports are available to qualified B2B buyers upon request. Our TM-21 projections typically show L70 ≥ 60,000 hours and L80 ≥ 36,000 hours for standard indoor fixtures.