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luminous efficacy(Light-to-Solar Gain Ratio)
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luminous efficacyThe amount of light produced by a lamp as measured in lumens compared to the amount of energy the lamp consumes.
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luminous efficacyQuotient of the luminous flux emitted by a source and the power consumed. [Unit lumen per watt, lm/W] Visible light output of a luminary measured relative to power input.
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