colour.luminous_efficiency¶

colour.luminous_efficiency(sd, lef=SpectralDistribution(name='CIE 1924 Photopic Standard Observer', ...))[source]¶

Returns the luminous efficiency 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 efficiency.
Return type:	numeric

References

[Wik03c]

Examples

>>> from colour import LIGHT_SOURCES_SDS
>>> sd = LIGHT_SOURCES_SDS['Neodimium Incandescent']
>>> luminous_efficiency(sd)  # doctest: +ELLIPSIS
0.1994393...