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Continue to ChatLED Lighting Efficiency Jumps Roughly 50% Since 2012 https://cleantechnica.com/2014/11/05/led-lighting-efficiency-jumps-roughly-50-since-2012/
LED Lighting Efficiency Jumps Roughly 50% Since 2012 https://cleantechnica.com/2014/11/05/led-lighting-efficiency-jumps-roughly-50-since-2012/