CIE 1988 2° modified spectral luminous efficiency function for photopic vision

[3.10.2.1] V_M(λ)

A supplemental modification of V(λ), adopted by the International Commission on Illumination (CIE) in 1990.* This function is principally of interest in the visual sciences. (See Table T-9.)

NOTE: This term’s definition was changed in ANSI/IES RP-16-17 Addendum 1.

* CIE No. 86, CIE 1988 2^o Spectral Luminous Efficiency Function for Photopic Vision. Vienna, Austria: International Commission on Illumination; 1990.