radiant efficiency

[2.6.2]  (of a source of radiation) (ηe)

Ratio of the radiant flux of the emitted radiation to the power consumed by the source. Unit: 1.*

Note: It must be specified whether or not the power dissipated by any auxiliary equipment such as ballasts, if any, is included in the power consumed by the source.

*. International Lighting Vocabulary, Third Edition CIE Document 17.4, Vienna: Commission Internationale de l’Eclairage, 1987.

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