magnification ratio, <of a luminaire>
ratio of the maximum luminous intensity of the luminaire, generally a projector, to the mean spherical luminous intensity of its lamp
Note 1 to entry: In certain countries, the definition of the magnification ratio varies according to the types of luminaires or lamps.
Note 2 to entry: The magnification ratio has unit one.
Note 3 to entry: This entry was numbered 845-09-43 in IEC 60050-845:1987.
Note 4 to entry: This entry was numbered 17-748 in CIE S 017:2011.