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How do LEDs work?

The process in which LED lights work is called electroluminescence. It's much more efficient than the process used by traditional (incandescent) light bulbs and lasts a lot longer.

In fact, LED lights produce light almost 90% more efficiently than traditional light bulbs! Basically, an electrical current passes through a microchip which illuminates little light sources that we call LEDs. The result is visible light with less heat and longer life spans.