# 17-29-070

utilance, <of an installation>

U

quotient of the luminous flux received by a reference surface and the sum of the individual output fluxes of the luminaires of the installation

Note 1 to entry: The utilance has unit one.

Note 2 to entry: This entry was numbered 845-09-53 in IEC 60050-845:1987.

Note 3 to entry: This entry was numbered 17-1382 in CIE S 017:2011.

Publication date: 2020-12