LED (Light-Emitting Diode) is a semiconductor electronic component that has the ability to emit light, or infrared or ultraviolet radiation. This is different from standard diodes. It is an electronic semiconductor device containing a PN junction. The official Czech name is electroluminescent diode. Furthermore, it is possible to come across names such as light emitting diode, light emitting diode, occasionally fluorescent lamp. Slang is called saltpeter.

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