LED
LED is ligt-emitting diodes. It’s about is lamps are power semiconductor. That allows electricity to flow through. Then let the light out of the LED bulbs are now familiar to a small lamp colors such as red or blue, depending on the materials used. But later revised blue LED coated with a fluorescent yellow glow. As a result, the light from the LED shines out to be white. And can be used as a lamp shining in a variety of formats more. LED invented by devised in 1869 by Russian chemist Dmitri Mendeleyev (1834-1907). LED devices use the electronic devices and appliances that we use at home and at work.