What is the standard of lm80 for LED?
LM-80 is IESNA (Illuminating Engineering Society of North America) approved the luminous flux maintenance rate (LED life) standard. The LM-80 test mainly focuses on the components of the light source, including LED packages, arrays and modules, and calculates the life of the components based on this data. Manufacturers of LED lights, light engines and LED lamps must obtain the "Energy Star" certification issued by the US Environmental Protection Agency, and the devices used in their products must meet the requirements of the LM-80 standard test.
Normally, the test time required and specified by LM-80 is at least 6000h, and it is recommended to test 10000h. And the temperature of the lamp test is mainly set to three points; 55℃, 85℃, the third temperature point is based on the actual situation Set it yourself. Generally speaking, the measurement report under the LM-80 standard includes the following parts; the number of LED light sources tested, the description of the LED light source, the description of the auxiliary equipment, the working cycle, the environmental conditions (air flow, temperature and relative humidity), and the case temperature (test points) Temperature), the driving current of the LED light source in the life test, the initial luminous flux, the forward voltage on the photometric measurement current, the data of the luminous flux maintenance rate of each LED light source, and the median value, standard deviation, and the lowest luminous flux maintenance rate of all LED light sources And the highest value, the LED light source failure includes the condition and time of the failure, the LED light source monitoring interval, the photometric measurement uncertainty and the change of the LED light source chromaticity during the measurement.
