# 17-29-111

CIE standard overcast sky

completely overcast sky for which the quotient of its luminance, Lγ, in the direction at an angle, γ, above the horizon and its luminance, Lz, at the zenith is given by the relation:

Note 1 to entry: This entry was numbered 845-09-90 in IEC 60050-845:1987.

Note 2 to entry: This entry was numbered 17-169 in CIE S 017:2011.

Publication date: 2020-12