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The best laser diodes are about as effective at turning electricity into light as a store-bought LED, but with one major difference: You can pump more than 2,000 times as much electricity into a laser diode. In theory, that means per square centimeter, a laser diode can produce 2,000 times as much light.Simply replacing the LED Flashlight light emitting diodes in a typical LED bulb with a laser diode wouldn’t work. For one, this hypothetical laser lightbulb would catch on fire from all the waste heat it would generate. Also, it would produce an ungodly amount of light, more than enough to blind anyone who looked at it. (Imagine a sphere made out of lasers shooting in every direction at once, like some kind of sci-fi weapon.)Rather, DenBaars imagines using just a handful of tiny but powerful lasers, and then redirecting their light into fiber optic cables and other types of light-transmitting plastic that could take that light and evenly distribute it into a warm, diffuse glow.It’s like Amazon Kindle Paperwhite, but it’s your whole ceilingThe “light guide” on Amazon’s Kindle Paperwhite could be a model for interior lighting. anty881209wong 131127 One way to evenly distribute laser light would be through what’s known as a waveguide. Waveguides are what allow the even illumination of the LED Light entire surface of Amazon’s Paperwhite display (not to mention other cutting-edge displays Amazon might be working on).In this way, it would be possible to take a single point source of light and use it to create a diffuse glow that seems to be emanating directly from the materials of a ceiling—or wall, or floor, or light fixture of any conceivable shape.“What you do is put that extra bright light source in a glass fiber, and you just weave it back and forth into squares, and scatter it over the ceiling,” says DenBaars. “It could even be cheap plastic fiber.”BMW is already rolling out laser-based headlightsWeaponizing BMW’s laser headlights will violate your warranty.BMWLest you think this is a pipe dream, DenBaars points to at least one real-world example of laser-based lighting technology that’s about to be available to the general public: the headlights of BMW’s “hybrid supercar,” the i8. Using blue laser diodes, BMW’s engineers were able to create a focused (but not too focused) beam of white light. Like all lasers re-appropriated for conventional illumination, these are aimed at a LED car light phosphor that transforms the blue laser light into more diffuse white light.