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LiFi? How your LED desk lamp could help you connect to the Internet

Lighting has come a long way since Tom Edison lit his first incandescent bulb in the 1880s. LED bulbs are popping up everywhere, on planes, car headlights, in your phone. When you buy a new light bulb now, chances are it's going to be an LED. At the heart of every LED is not a little wire. If you open up an LED, there's a semiconductor in there, and engineers are exploring more ways to use that semiconductor — everything from wireless data streaming to secure communication systems and in-flight networking.

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