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Ever wonder how much electricity it takes to keep a single light bulb running for the year? It takes 714 pounds of coal to power a single light bulb for a year. Or, 143 pounds of natural gas. Or nearly 9 days' worth of sunlight hitting a 100 square meter solar array. Or 0.035 pounds of uranium. Or over two and a half hours of a hydroelectric plant operating at 80% capacity.