IEVref:845-29-066ID:
Language:enStatus: Standard
Term: upward light ratio
Synonym1: ULR
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Definition: proportion of the flux of a luminaire or installation that is emitted, at and above the horizontal, when the luminaire(s) is (are) mounted in its (their) installed position

Note 1 to entry: The upward light ratio has unit one.

Note 2 to entry: This note applies to the French language only.


Publication date:2020-12
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