How many NC State engineering students does it take to replace an inefficient light bulb with an energy-efficient one?
Five: Three to design a nuclear-powered light bulb that never needs changing, one to install it, and one to write the computer program that controls the wall switch.
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By replacing your five most-used light bulbs with ENERGY STAR-qualified bulbs, you could save $70 a year.
Source: U.S. Environmental Protection Agency (Energy Star)