colour.luminous_efficiency

colour.luminous_efficiency(spd, lef=SpectralPowerDistribution(name='CIE 1924 Photopic Standard Observer', ...))[source]

Returns the luminous efficiency of given spectral power distribution using given luminous efficiency function.

Parameters:
Returns:

Luminous efficiency.

Return type:

numeric

References

Examples

>>> from colour import LIGHT_SOURCES_RELATIVE_SPDS
>>> spd = LIGHT_SOURCES_RELATIVE_SPDS['Neodimium Incandescent']
>>> luminous_efficiency(spd)  
0.1994393...