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LED holiday lights really are quite efficient

Strands of lights are ubiquitous this time of year — tangled in leafless trees, framing windows, sparkling their way to Santa’s sled. They are a beaming reminder of both the warm feelings of the holiday season and the environmental costs of this time of hyper-consumption. In 2003, a paper published by the Department of Energy estimated that holiday lights accounted for 2.22 terawatt-hours of energy use per year in the United States, which roughly equals the energy consumed by 200,000 homes annually. With numbers like that, coal may be the best thing to stuff in your neighbor’s twinkling stocking. He may need it.

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