colour.luminous_flux

colour.luminous_flux(sd, lef=None, 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, default to the CIE 1924 Photopic Standard Observer.

  • K_m (numeric, optional) – \(lm\cdot W^{-1}\) maximum photopic luminous efficiency

Returns

Luminous flux.

Return type

numeric

References

[Wikipedia03c]

Examples

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