From most to least energy efficient:
LED (light-emitting diode)
10 - 150 lm/W
compact fluorescent (CFL)
46 - 72 lm/W
halogen
19.2 - 24 lm/W
incandescent (traditional tungsten)
5 - 17.5 lm/W
Images from Wikimedia Commons
Sources
Friday, September 18, 2009
Light bulbs ranked by energy efficiency
I've often wondered how energy-efficient different types of light bulbs are. Here are some common bulb types, ranked by luminous efficacy. Luminous efficacy measures how much light the bulb produces for the electricity it takes in. The unit of measurement is lumens per watt (lm/W).
From most to least energy efficient:
LED (light-emitting diode)
10 - 150 lm/W
compact fluorescent (CFL)
46 - 72 lm/W
halogen
19.2 - 24 lm/W
incandescent (traditional tungsten)
5 - 17.5 lm/W
Images from Wikimedia Commons
Sources
From most to least energy efficient:
LED (light-emitting diode)
10 - 150 lm/W
compact fluorescent (CFL)
46 - 72 lm/W
halogen
19.2 - 24 lm/W
incandescent (traditional tungsten)
5 - 17.5 lm/W
Images from Wikimedia Commons
Sources
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