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  • 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 by the light source. This is known as luminous efficacy. The efficacy of LEDs is improving all the time and have recently exceeded more traditional types of lamps.For a rough comparison, the range of luminous efficacies for traditional and LED sources, including b ...More
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