An LED generates lights because the radiation in its atoms of certain materials is of the frequencies of visible light.
An LED will only generate light when it is reverse biased. A multicolor LED is built with two LEDs of various colors in one package.
A LED (Light Emitting Diode) may be a semiconductor light that emits light when current flows through in electrons within the semiconductor recombine with electron holes, releasing energy within the kind of photons (Energy packets).
Compared to standard light sources that first convert voltage into heat, and so into light, LEDs (Light Emitting Diodes) convert power directly into light, delivering efficient light generation with light generation with little-wasted electricity.
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