colour.luminous_efficiency

colour.luminous_efficiency(sd: colour.colorimetry.spectrum.SpectralDistribution, lef: Optional[colour.colorimetry.spectrum.SpectralDistribution] = None) → float

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

Parameters

• sd (colour.colorimetry.spectrum.SpectralDistribution) – test spectral distribution

• lef (Optional[colour.colorimetry.spectrum.SpectralDistribution]) – \(V(\lambda)\) luminous efficiency function, default to the CIE 1924 Photopic Standard Observer.

Returns

Luminous efficiency.

Return type

numpy.floating

References

[Wikipedia03c]

Examples

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

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