IES LM79 is the lamp energy efficiency standard approved by the Illuminating Engineering Society of North America (IESNA), primarily for photometric performance testing. Due to certain test items requiring a distribution photometer for completion, most manufacturers are unable to produce a comprehensive report. This test typically targets complete lamp manufacturers. The main test items include: total luminous flux, luminous efficiency, light intensity distribution, correlated color temperature (CCT), color rendering index (CRI), chromaticity coordinates (also known as chromaticity coordinates), input AC (or DC) voltage, input AC (or DC) current, input power (DC or AC), input voltage frequency, power factor.

IES LM79 tests typically take one week to complete; two samples provided.

IES LM80 is the standard for luminous maintenance rate (LED lifespan), primarily testing the maintenance rate of luminous flux output, which is essentially the lifespan test for LED light sources. Note: Luminous flux refers to the light energy emitted from the surface of a light source that can be perceived by the human eye. Its unit of measurement is lumen (lm).

LM79

LM79 specifies the testing methods for parameters such as total luminous flux, electrical power, light intensity distribution, color parameters, and color uniformity for products. This standard covers SSL products with LED as well as integrated LED lamps (requiring only AC or DC drive). It does not cover SSL products requiring external drive circuits or external heat sinks (such as LED chips, LED packages, and LED modules, etc.). Generally, the tests can be divided into integrating sphere tests and distribution photometer tests.

Score Ball Test: Voltage, Current, Power, Color Temperature, Color Rendering Index, Spectral Distribution.

Photometric Distributor Test: Voltage, Current, Power, Total Luminous Flux, Luminous Intensity Distribution, Color Uniformity

For LM79, the integral sphere test does not measure luminous flux; otherwise, it requires very complex steps such as auxiliary lighting.

LM79/LM80/TM21 Certification Process

Fill out the application form.

2. Provide product information.

3. Send samples

4. Test passed.

5. Release the report.

Cost: Assessed based on actual circumstances