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LEDs are semiconductor diodes, electronic devices that permit current to flow in only one direction. The diode is formed by bringing two slightly different materials together to form a PN junction (Figure 2). In a PN junction, the P side contains excess positive charge ("holes," indicating the absence of electrons) while the N side contains excess negative charge (electrons).
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode
A LED is a semiconductor diode that makes a small light source. We can compare the quality of the LED as we do it at the electrical energy(by the number of lucs)
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