APPS1 EERE ENERGY
Energy Efficiency of White LEDs Building Technologies Program Energy Efficiency of White LEDs The energy efficiency of light-emitting diodes (LEDs) is expected to rival the most efficient white light sources by 2010. But how energy efficient are LEDs right now? This fact sheet discusses various aspects of lighting energy efficiency and the rapidly evolving status of white LEDs. Luminous Efficacy Energy efficiency of light sources is typically measured in lumens per watt (lm/W), meaning the amount of light produced for each watt of electricity consumed MoreTerms. Lumen – the SI unit of luminous flux. The total amount of light emitted by a light source, without regard to direc- tionality, is given in lumens. Luminous ... Less
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