IES LM-49-20 (R2023)

This Approved Method describes the procedures to be followed and the precautions to be observed in obtaining uniform and reproducible measurements during life testing of incandescent filament lamps under standard conditions. This document covers general service incandescent lamps, tungsten-halogen lamps, series airport markers, and street lighting lamps. Not included are automotive, miniature and sub-miniature, photo-optic, and other special lamp types. This Approved Method covers life testing of incandescent lamps at rated voltage or rated current.