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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site lumens/watt (lpw) A measure of the efficacy (efficiency) of lamps. It indicates the amount of light (lumens) emitted by the lamp for each unit of electrical power (watts) used. Related categories    • SOLAR ENERGY AND POWER    • UNITS Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP