LM-80 Test Report for LED Lighting – Complete Standard & Compliance Guide

In the LED lighting industry, product service life is one of the core indicators of quality.For lighting manufacturers exporting to the U.S. or bidding for domestic engineering projects,an LM-80 test report has become a critical document to prove the reliability of LED components.

For luminaire makers, the LM-80 report is not only a prerequisite for certifications such as ENERGY STAR and DLC,but also strong evidence to demonstrate long-term product performance to customers.This article systematically interprets the standard requirements, testing process,and compliance value of the LM-80 test report for LED lighting.

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I. What is an LM-80 Test Report?

LM-80 stands forIES Approved Method for Measuring Luminous Flux and Color Maintenance of LED Packages, Arrays and Modules.It is a standard published jointly by theIlluminating Engineering Society (IES) and the American National Standards Institute (ANSI)that defines how to measure lumen maintenance and color maintenance of LED components.

The standard provides a unified testing method for LED packages, arrays, modules, and COB light sources,obtaining data on luminous flux and color shift over long-term operation,enabling reliable comparison of results across manufacturers and laboratories.

In short:LM-80 is a testing protocol that defines how to measure light decay of LED components,but does not calculate service life.Lifetime projection is completed using the companion TM-21 standard.

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II. Core Requirements of LM-80 Testing

1. Test Objects

LM-80 applies to:

• LED packages (2835, 3030, 5050 SMD LEDs, etc.)
• LED arrays
• LED modules
• COB light sources

2. Test Duration

Testing must last at least 6,000 hours.Luminous flux and color data must be recorded at fixed intervals:0, 1000, 2000, …, 6000 hours.Longer durations (e.g., 10,000 hours) provide higher statistical confidence.

3. Temperature Requirements

Tests must be performed at at least three different solder point temperatures (Ts):

• 55°C (industry reference)
• 85°C (industry reference)
• One manufacturer-selected temperature (based on application)

Note: After 2014, the appendix allows at least one temperature at 55°C or 85°C,but most labs still use three temperatures for better data comparison.

4. Sample Quantity

• LED packages: ≥ 25 samples
• COB / filament types: ≥ 10 samples

5. Key Test Indicators

• Lumen maintenance: percentage of initial luminous flux at each interval
• Color maintenance: color coordinate shift (Δu'v') over time

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III. TM-21: Lifetime Projection from LM-80 Data

LM-80 alone does not provide a direct lifetime value.TM-21 (Projecting Long-Term Lumen Maintenance of LED Light Sources)specifies how to use LM-80 data to predict long-term lumen maintenance.

TM-21 Projection Rules

• Maximum projection: 6× the test duration
  • 6,000 hours LM-80 → up to 36,000 hours
  • 10,000 hours LM-80 → up to 60,000 hours
• Reported Lumen Maintenance Life: industry-standard L70 (time to 70% flux) or L50,used for official certification claims.

Important note:“Calculated Value” was removed from TM-21 appendix;only Reported Lumen Maintenance Life is used to avoid misinterpretation.

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IV. Core Applications of LM-80 Report

1. ENERGY STAR Certification

LM-80 is required for lifetime claims:

• With LM-80: luminaire qualifies after 3,000 hours of aging
• Without LM-80: requires 6,000 hours of aging

2. DLC Certification

DLC (DesignLights Consortium) accepts lumen maintenance compliance verified via TM-21 based on LM-80 data.DLC requires LM-80 reports from EPA-recognized laboratories.

3. FTC Energy Label

Amazon US requires FTC Lighting Facts labels,where lumen maintenance values are derived from LM-80 and TM-21.

4. Retail & Engineering Access

Home Depot, Walmart, and government projects typically requirelifetime evaluation reports based on LM-80 / TM-21.

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V. Laboratory Accreditation Requirements

表格

Certification	Lab Requirement
ENERGY STAR	EPA-recognized lab (LM-80 qualified)
DLC	EPA-recognized lab (at time of submission)
Amazon / FTC	ISO 17025-accredited lab

For DLC, additional documents are required:ISTMT (In-Situ Temperature Measurement) report, TM-21 spreadsheet, Ts point photos.

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VI. Typical Paths for Lighting Manufacturers

Method 1: Use LM-80 from LED Supplier

Most cost-effective.Obtain LM-80 + TM-21 from the LED package factory,combine with luminaire ISTMT (actual Ts temperature),to support lifetime claims.

Method 2: Commission Third-Party Testing

For custom LEDs or unavailable supplier reports.Note: long cycle (6,000–10,000 hours) requires early planning.

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VII. Common Mistakes & Avoidance Tips

Mistake 1: Believing LM-80 directly gives product lifetime.

Fact: LM-80 only provides raw data;lifetime needs TM-21 + actual operating temperature (ISTMT).

Mistake 2: Using non-approved lab reports.

Fact: ENERGY STAR and DLC require EPA-recognized labs;general CNAS reports may be rejected.

Mistake 3: Ignoring temperature matching.

Fact: TM-21 uses interpolation between two adjacent LM-80 test temperatures.If actual operating temperature is outside the test range, projection may fail.

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Conclusion

The LM-80 test report is essential for LED lighting entering the U.S. marketand proving long-term reliability.Understanding the LM-80–TM-21 relationship and choosing qualified labsreduces compliance risk and improves competitiveness.

Manufacturers should request LM-80 and TM-21 from LED suppliers during component selection,and plan testing according to target market certification rules.