luminescent luminance factor, <of a photoluminescent material>
luminance in a given direction that results from emission at the surface of a photoluminescent medium under specified conditions of illumination, compared to the luminance in the same direction by the perfect reflecting diffuser identically illuminated
Note 1 to entry: The luminescent luminance factor depends upon the spectral power distribution of the illumination and this quantity is typically specified for a given CIE illuminant condition.
Note 2 to entry: The luminescent luminance factor has unit one.
Note 3 to entry: This entry was numbered 17-723 in CIE S 017:2011.