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