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Definition of Luminous flux
1. Noun. The rate of flow of light energy. 
Generic synonyms: Radiant Flux
Medical Definition of Luminous flux
1. The quantity of light emitted from a point source in a given time; its unit is the lumen. (05 Mar 2000)
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1. Noun. The rate of flow of light energy. 
1. The quantity of light emitted from a point source in a given time; its unit is the lumen. (05 Mar 2000)