New $3 Light Bulb is 12 Times More Efficient and Lasts 60 Years

Cambridge University researchers have developed a $3 LED-based lightbulb that is 12 times more efficient than regular tungsten light bulbs, three times more than low energy ones. It lights up instantly, lasting for 100,000 hours,

The cheap lightbulb could cost the energy bill in any house by as much as three quarters. In fact, if everyone replaced their current light bulbs, the proportion of lighting in electricity consumption would go down from 20 to 5 percent worldwide.

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