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Bridgelux demonstrates silicon substrate LED that produces 135 lumens per watt
9. 3 2011 (23:24)
(PhysOrg.com) -- Silicon substrate LED's are cool, but you won't find them in your TV, or in the headlights of your car. They simply do not throw off enough light to be used in commercial applications. Or, at least they did not used to be able to.
