Home > Terms > English, UK (UE) > Efficacy
Efficacy
The amount of energy service or useful energy delivered per unit of energy input. Often used in reference to lighting systems, where the visible light output of a luminary is relative to power input; expressed in lumens per Watt; the higher the efficacy value, the higher the energy efficiency.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Energy
- Category: Energy efficiency
- Company: U.S. DOE
- Product:
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