[9.4.8]
NOTE: This term’s definition was changed in RP-16-17 Addendum 1. Deletions have a strike-through. New text is bold.
The ratio of luminous flux (lumens) emitted by a luminaire to that emitted by the lamp or lamps used therein.
The luminous flux emitted by a luminaire, divided by the luminous flux emitted by the source(s). Sometimes called light output ratio (LOR).
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