- the rate of transmission of luminous energy: expressed in lumens.
Origin of luminous flux
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a measure of the rate of flow of luminous energy, evaluated according to its ability to produce a visual sensation. For a monochromatic light it is the radiant flux multiplied by the spectral luminous efficiency of the light. It is measured in lumensSymbol: Φ v
- A measure of the radiant power of light emitted from a source without regard for the direction in which it is emitted. It is measured in lumens. See also luminous intensity.
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