A light bulb being made at Aquarest Electrical Ltd of Swindon, UK, in 1964. We've come a long way, indeed.
The U.S. Department of Energy (DOE) delivered one of its CALiPER Snapshot reports covering the industrial lighting products in its LED Lighting Facts database, its first update on the industrial lighting category since June 2014. The report shows substantial advances in efficacy and performance of luminaires listed for industrial applications in the database over the past three years. In June 2014, the mean efficacy for listed industrial luminaires was 93 lm/W; today, it’s about 20% ...
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