colour.luminous_efficiency#

colour.luminous_efficiency(sd: SpectralDistribution, lef: Optional[SpectralDistribution] = None) float[source]#

Return the luminous efficiency of given spectral distribution using given luminous efficiency function.

Parameters:
Returns:

Luminous efficiency.

Return type:

numpy.floating

References

[Wikipedia03b]

Examples

>>> from colour import SDS_LIGHT_SOURCES
>>> sd = SDS_LIGHT_SOURCES['Neodimium Incandescent']
>>> luminous_efficiency(sd)  
0.1994393...