Luminous Efficacy

2-1-030

Luminous Efficacy (of a source)

The quotient of the luminous flux emitted by the power consumed.

Symbol: ?

Unit: lumen per watt (Im/W)

Note: Formerly Luminous Efficiency

Reference: C.I.E. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

English