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LEDs will inherit the world

LEDs are already the brightest light source in the universe—upscaling the previous champ, the arc-lamp. By 2076 they will have not only replaced every other light source, but will also have replaced all other short-range communications (such as Wi-Fi and Bluetooth) with light-pulse encoded signals coming out of every SSL (solid-state light), from freeway lamps to automobile head- and tail-lights, to commercial and home lighting systems.

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