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Intern's Corner: DIY LED yo-yo side caps 
MAKE Magazine | by Keith Hammond | Wed, Dec 30
MAKE Magazine is the #5 Blogger for LED lamp
How It Works
Using the centrifugal force generated by the spinning of the yo-yo, the spring, acting as the switch, is pulled outward. It makes contact with the positive leads of the LEDs, thus completing the circuit, turning the LEDs on.
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Photo Gallery
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
