Projectors are amazing these days — the ones in corporate boardrooms, the ones in home theaters and the ones that fulfill both functions. But most still have a regular old light bulb inside. A very, very bright one that gets very, very hot and costs very, very much to replace — maybe $300 or $400. And that’s after about 2,000 hours of use. If you could replace that hot, expensive bulb with LED lights, you’d use half as much power, so you’d be polluting less. Because it would need less cooling, your projector could be much smaller and lighter.
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