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Incandescent Bulb Redesign Recycles Waste Radiation

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A redesigned incandescent bulb recycles heat radiation to emit visible light with an efficiency comparable to that of some fluorescent and LED bulbs. The ubiquitous incandescent light bulb is a high-temperature thermal emitter, producing mostly invisible and, in the context of illumination, unwanted IR light. Now researchers from the Massachusetts Institute of Technology (MIT) have designed a bulb that mitigates wasted energy. The proof-of-concept incandescent bulbs are more energy efficient, and elements of their design could also improve the performance of other hot thermal...Read full article

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