Since last year, our team salesmen got this question from different customers every month. And recently, we got this question at a higher frequency. So, today we decide to write a blog post and try to help understanding the LM-80 report of LED lights.
Since LED lighting became the main force of lighting industry, everyone is looking forward a really international criterion for this Solid State Lighting. And after one year draft amending, United States Energy Star issued their final version criterion for Solid State Lighting Luminaries on 2009 September.
The Energy Star Solid State Lighting Luminaries Criterion is not only made according to the existing lighting industry reference standards, test procedures, also keeping developed and amended by professional lighting industry organizations. It suit for vast majority LED lamps (led panel, high bay light, street light, flood light, led ceiling lamp etc.), including some decorative items which also have a lighting function. But the traffic lights, emergency exit sign light, and LED products designed for decoration, or solid-state lighting products for upgrading existing equipment/machine are not apply to this criterion.
LM-80 is a key point of Energy Star Solid State Lighting Luminaries Criterion, which helps us to evaluate LED lights, but not the quality of integrated lamp. It just tells you the light source part of light is reliable or not. Yes, only measures the quality and estimates the lifespan of LED.
About the testing procedures of LM-80, here we have a simple description.
First we need find a qualify certification lab which can handle the LM-80 test, and then we need send some LED packages/arrays/modules for a component level testing to the lab. And the whole testing will take 6,000 hours, and after 6~9 months we will get a test report(i.e. IES LM-80-08, or LM-80 test report) from the certification company. This test report will show us the luminous flux changing of LED during whole testing, and LED was working at a special given current in the testing. The luminous flux is interval measured from 3 different temperature — 55℃, 85 ℃ and another temperature selected by manufacturer.
So, LM-80 is not mean integrated lamp lumen output efficacy > 80LM/W, and also do not tell us the whole lamp can working as long as the LED estimate lifespan. Just mean the light source part — LED quality is good and surely has a long service time.
For your better understanding, we are going to show you the LM-80 test report of latest 5630 LED in the following,