colour.luminous_efficacy¶
-
colour.
luminous_efficacy
(sd, lef=SpectralDistribution(name='CIE 1924 Photopic Standard Observer', ...))[source]¶ Returns the luminous efficacy in \(lm\cdot W^{-1}\) of given spectral distribution using given luminous efficiency function.
- Parameters
sd (SpectralDistribution) – test spectral distribution
lef (SpectralDistribution, optional) – \(V(\lambda)\) luminous efficiency function.
- Returns
Luminous efficacy in \(lm\cdot W^{-1}\).
- Return type
numeric
References
Examples
>>> from colour import LIGHT_SOURCES_SDS >>> sd = LIGHT_SOURCES_SDS['Neodimium Incandescent'] >>> luminous_efficacy(sd) 136.2170803...