# 17-29-049

cumulative downward flux proportion, <of a light source, for a solid angle>

quotient of the cumulative flux for the solid angle under consideration and the downward flux of the light source

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

Note 2 to entry: This entry was numbered 845-09-36 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-266 in CIE S 017:2011.

Publication date: 2020-12