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Light Emitting Diode
A light emitting diode (LED) is a semiconductor that emits light when electric current is applied.
While a single LED emits light of a single color, different LEDs that emit different colors (such as red, yellow, green and blue) can be created by using different materials for producing them. A variety of colors can be realized by combining such LEDs.
Having such characteristics as being small in size, long lasting and having low power consumption for emitting light, LEDs are used in a wide range of applications including indicator lamps for mobile phones and other electronic devices, traffic lights, electric signboards and illumination lights. They are now used in home-use lighting fixtures as well due to a decrease in prices realized through technological innovation.