LED Bulbs

LED

LED's are semiconductor diodes that typically emit a single wavelength of light when charged with electricity. In English, more or less, this means electronic thingies using crystals where current flows only on one direction. And that's as technical as we're gonna get around here.

These Light Emitting Diodes (you wondered when we'd get to what LED meant?) used to only give off red light, but today, several colors can be generated based on the crystal material used for the tips of the probes. Indium gallium nitride (InGaN) is used for green and blue, for example. With the addition of phosphor, it can emit white light. White light can also be produced through a mix of red, blue and green LEDs.

Since these guys don't use filaments to burn out, they last longer than incandescent bulbs, degrading gradually rather than just crashing. And their lifetime is not shortened by being turned on and off.

The biggest advantage to LED bulbs is their energy efficiencey. While incandescent bulbs dissipate about 80% of their energy in heat, LED bulbs convert about 80% of their electrical energy for light. So flashlights, which use only batteries for power and are held in your hands, are a perfect place for these light sources. Hey, some LED's are projected to last 100,000 hours. Good chance you'll quit before they do!

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LED Bulbs

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