luminous flux

noun

, Optics.

1. the rate of transmission of luminous energy: expressed in lumens.

luminous flux

noun

1. 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 lumens Φv

luminous flux

/ lo̅o̅′mə-nəs /

1. 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.
2. See also luminous intensity

Word History and Origins

Origin of luminous flux¹

First recorded in 1925–30