This Philips bulb won the Department of Energy contest that sought an affordable, energy-saving alternative to a 60-watt incandescent. The bulb is indisputably energy-efficient but costs $50. Read related article.

Sources: Department of Energy, Philips Corp., Pepco, This is a corrected version of a graphic that appeared in the paper on March 9 | Graphic: Bonnie Berkowitz and Patterson Clark/The Washington Post March 8, 2012
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