# 17-31-026

luminous range

greatest distance at which a given signal light can be recognized in any particular circumstances, as limited only by the atmospheric transmissivity and by the threshold of illuminance at the eye of the observer

Note 1 to entry: This entry was numbered 845-11-28 in IEC 60050-845:1987.

Note 2 to entry: This entry was numbered 17-740 in CIE S 017:2011.

Publication date: 2020-12