luminous efficacy
Britishnoun
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K. the quotient of the luminous flux of a radiation and its corresponding radiant flux
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ηv. Φv. the quotient of the luminous flux emitted by a source of radiation and the power it consumes. It is measured in lumens per watt
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
