MIT has an incandescent lamp technology which could reach 40% luminous efficiency, although the proof-of-concept device achieves around 6.6%. Its figures for other sources are: 2-3% for conventional incandescent lights, 7-15% for fluorescent sources including CCFLs, and 5-15% for what it calls “compact LEDs”. That said, there are more efficient LED and fluorescent sources. At issue is ...
MIT builds a better light bulb
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