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flux triplet, <of a light source>
set of the values of the cumulative downward flux proportions of the light source for the solid angle π/2 sr, π sr, and 3π/2 sr, representative for the relative downward flux distribution of the light source, used in the calculation of the direct ratio of installations of that light source
Note 1 to entry: This entry was numbered 845-09-37 in IEC 60050-845:1987.
Note 2 to entry: This entry was numbered 17-464 in CIE S 017:2011.