This article from the Economist talks up the promise of cheaper LED lights in the future, with a new manufacturing method potentially makes the process about 10 times cheaper.
But here's a figure that's handy to keep in your head for the next lull in a conversation:
About 20% of the world’s electricity is used for lighting. America’s Department of Energy thinks that, with LEDs, this could be cut in half by 2025, saving more than 130 new power stations in America alone.
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