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How to make an LED or a light emitting diode 
wonderhowto.com | Wed, Mar 25
Take a tour through the world of the light-emitting diode. Learn - who invented it, how to use it, and how to make your own. A light-emitting ...
www.wonderhowto.com
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Opinion: Hot Electric Metal Encased in a Sphere of Glass
Most of this does not concern me, or move me to object in any way to LED lightbulbs, as much as the thought of LED light itself, so alien, in my house. In wikipedia, we get a description, under the disadvantages of the problems of white LEDs that "spike at 460 nm and dip at 500 nm," causing objects...
Mon, Nov 30 | from Gizmodo
