colour.luminous_flux¶

colour.luminous_flux(sd, lef=SpectralDistribution(name='CIE 1924 Photopic Standard Observer', ...), K_m=683.0)[source]¶

Returns the luminous flux for given spectral distribution using given luminous efficiency function.

Parameters

sd (SpectralDistribution) – test spectral distribution
lef (SpectralDistribution, optional) – \(V(\lambda)\) luminous efficiency function.
K_m (numeric, optional) – \(lm\cdot W^{-1}\) maximum photopic luminous efficiency

Returns

Luminous flux.

Return type

numeric

References

[]

Examples

>>> from colour import SDS_LIGHT_SOURCES
>>> sd = SDS_LIGHT_SOURCES['Neodimium Incandescent']
>>> luminous_flux(sd)  
23807.6555273...