light-loss-factor
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light loss factor (LLF)
Also called: LLF
Standards
the ratio of the illuminance produced by a lighting system at a specified time to the illuminance produced by the same system when new
The LLF combines the losses caused by lamp lumen depreciation, luminaire depreciation and room surface depreciation. Further information is available in
AS/NZS 1680.1
.
Source - AS/NZS 2293.1:2018: Emergency lighting and exit signs for buildings
HB50
ratio of the illuminance produced by a lighting system at a specified time to the illuminance produced by the same system when new
The LLF combines the losses caused by lamp lumen depreciation, luminaire depreciation and room surface depreciation.