LED
Once again, howstuffworks has enlightened me on what led lights are:
Light emitting diodes, commonly called LEDs, are real unsung heroes in the electronics world. They do dozens of different jobs and are found in all kinds of devices. Among other things, they form the numbers on digital clocks, transmit information from remote controls, light up watches and tell you when your appliances are turned on. Collected together, they can form images on a jumbo television screen or illuminate a traffic light.
Basically, LEDs are just tiny light bulbs that fit easily into an electrical circuit. But unlike ordinary incandescent bulbs, they don’t have a filament that will burn out, and they don’t get especially hot. They are illuminated solely by the movement of electrons in a semiconductor material, and they last just as long as a standard transistor.
I think the coolest led lights ever were Kit’s, the talking bondish car on Knight Rider.
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One Comment on LED
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Norman on
Thu, 12th Mar 2009 11:54 am
The thing about LEDs for me is their welcome comeback, and how such a simple old technology could be revisited in new ways. I’ve toyed endlessly with them in the height of the electronics craze in my teens, where they become basic elements of stereo VU meters and portable dancing lights to go with my propellerheads. Now we see them everywhere in traffic lights, flat screens, flashlights, etc.
By the way, they’re the best ones to use in your light trail shots 
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