luminous efficiency, <for a specified photometric condition>
Note 1 to entry: The photometric condition should be specified (e.g. photopic, scotopic, mesopic). If it is not specified, photopic vision is assumed and the symbol
Note 2 to entry: Luminous efficiency for photopic vision is expressed by
Note 3 to entry: The luminous efficiency has unit one.
Note 4 to entry: This entry was numbered 845-01-57 in IEC 60050-845:1987.
Note 5 to entry: This entry was numbered 17-731 in CIE S 017:2011.