Energy Efficiency Column
What are The Definitions and Test Content of LM79, ISTMT and TM21?
Co-Presented by UPSHINE and TÜV Rheinland
LM 79 is an approved method of Electrical and Photometric Measurements of Solid-State Lighting Products, describes the procedures to be followed and precautions to be observed in performing reproducible measurements of total luminous flux, electrical power, luminous intensity distribution, and chromaticity, of solid-state lighting(SSL) products for illumination purposes, under standard conditions.