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Luminous Flux (Φᵥ) ○◂｜Definition｜1st｜20260122123527-00-⌔

Luminous flux - Wikipedia

Luminous flux

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In photometry, luminous flux1 or luminous power2 is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of electromagnetic radiation (including infrared, ultraviolet, and visible light), in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light.

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Printed 2026-06-28.

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Footnotes

  1. Boyce, Peter Robert (2014). Human Factors in Lighting (3rd ed.). CRC Press. pp. 6–7. ISBN 978-1-4398-7488-2. ↩

  2. Weik, Martin (1996). Communications Standard Dictionary (3rd ed.). Chapman & Hall. p. 542. ISBN 978-1-4613-8048-1. ↩

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