Luminous Efficiency

Luminous Efficiency

For a given wavelength of visible radiation, the ratio of the flux that is effectively sensed by the human eye to the flux that is intrinsic in the radiation. It may be represented as a dimensionless ratio, e.g., lumens per watt. Also called luminosity.

Thus, luminous efficiency is a weighting factor which is applied to radiation quantities so that they are related physiologically to the response of the human eye, which varies as a function of wavelength. All quantities which are weighted in this manner should be modified by the term luminous (e.g., luminous emittance, luminous flux, etc.)

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References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use