The LM-80-80 Measuring Lumen Maintenance of LED Light Sources, also referred to as LM80, was established by Illuminating Engineering Society of North America (IESNA), used to describe measurements of lumen depreciation in LED light sources, including LED package, arrays and modules.
LED light source degrades over time until beyond useful light output eventually. LM80 requires measurement performed at multiple temperatures, including 55°C, 85°C and 3rd manufacturer selected temperature, for 6000 hours. This method is used to evaluate the quality and life of LED light source.
LM80 is currently implemented as a common standard by global LED brands and downstream fixture manufacturers to determine the light quality and life of LED package.
Test basics on LED light source (LED package, arrays and modules)
1. Lumen maintenance at multiple temperatures
2. Chromaticity shift over time at multiple temperatures