As is well -known, working under a standard current and condition, LED will keep a long worklife, 50000 hours even longer. During spending the entire life, the LED light output is slowly depreciation , the spectrum may shift, resulting in color and luminious efficacy failure. In order to better promote the standard development, testing and certification of LED lighting product and regulate the LED market flourish, IESNA and ANSI jointly issued the LM-80 certification and TM-21.
In generally, LM-80 is a test for LED packages, arrays, and maintance lumen and color of modules. The testing time need to reach 6000 hours according to standard of Energy Start and IESNA LM-80, which can allow to do LM-80 testing certificate and reports using LED package, array, module optics. This report is a world-recognized international certification for the performance of products with a world-recognized and credible method, an important criterion for the quality of LED light sources.
In the LM-80 report, testing is required at least one product, at the same current, at three different temperatures (55 ° C / 85 ° C / optional temperature). When the LED device is used in the finished product, it will test the temperature of its corresponding point and the driving current of the LED. Comparing the temperature and current conditions of the finished product with the temperature and current conditions in the report, if the conditions in the report are more stringent, the reported data can be adopted.
During the LM-80 test, the aging process needs to be separated from the test process. The aging process must strictly control the temperature of the Tc to 55 degrees, 85 degrees, or the temperature specified by the supplier. After aging to the specified test interval, return to the test environment for photometric testing. The LM-80 requires testing of luminous flux and color parameters, and has high requirements for environmental control, temperature control of Tc, and power supply equipment, also has detailed requirements for tracking and recording of samples and aging processes. It can be said that passing the LM-80 certification is the highest recognition of the product, and it also means that it has achieved international leadership in terms of lumen maintenance and life, and can meet the demanding needs of the high-end LED intelligent lighting market.
