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British Dictionary definitions for spectral luminous efficiency

spectral luminous efficiency

noun
  1. a measure of the efficiency of radiation of a given wavelength in producing a visual sensation. It is equal to the ratio of the radiant flux at a standard wavelength to that at the given wavelength when the standard wavelength is chosen so that the maximum value of this ratio is unitySymbol: V ( λ ) ((for photopic vision)), V′ ( λ ) ((for scotopic vision))
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