Lamp Efficacy - LE Law and Legal Definition

According to 10 CFR 430.2 [Title 10 – Energy; Chapter II -- Department of Energy; Subchapter D -- Energy Conservation; Part 430 -- Energy Conservation Program for Consumer Products; Subpart A -- General Provisions], the term Lamp Efficacy (LE) means “the measured lumen output of a lamp in lumens divided by the measured lamp electrical power input in watts expressed in units of lumens per watt (LPW).