Applications of LEDs :
1. An LED is commonly used as an On/Off indicator lamp on electrical equipment.
2. LEDs are used in self-luminous seven segment alphanumeric displays of calculators and digital clocks and meters, signages, etc.
3. Because of their low power consumption, LEDs are now commonly used in traffic signals, handheld torches, LED TV sets, domestic and decorative illumination and various indicator lamps in light motor vehicles and two-wheelers.
4. Under certain conditions, the essentially monochromatic light emitted by an LED is also coherent. Such diode lasers have found applications in optical fibre communications, CD players, CDROM drives, laser printers, bar code scanners, laser pointers, etc.
