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.