 luminous efficacy of radiation, for a specified photometric condition

Publisher: International Commission on Illumination.

Online text: www.cie.co.at/eilvterm/17-21-090

Cited passages: Definition, Notes 1–2 and 5: ratio of luminous to radiant flux, photometric condition and units; Luminous efficacy of radiation, Note 3: defining frequency, standard-air wavelength and distinction from the peak.