Light Bulb Market Update: LED Efficiency Has Doubled, And Prices Have Fallen

Several years ago, I was hard pressed to find an LED light bulb offering reasonable efficiency without an exorbitant price. We’re talking about $10-$20 for a dim bulb (40-Watt equivalent/450 lumens and less in some cases) achieving 45 lumens per Watt (lm/W). An efficiency of 45 lumens per Watt (usually up to 55) was common…