cie

17-29-054

downward flux fraction

quotient of the downward flux and the total flux of a luminaire

Note 1 to entry: The downward flux fraction has unit one.

Note 2 to entry: This entry was numbered 845-09-41 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-351 in CIE S 017:2011.

Publication date: 2020-12
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