An LED is a two-way semiconductor source. It is a p-n connector that emits light when it is activated. When an appropriate voltage is applied to the conductors, the electrons can recombine with holes electrons inside releasing energy as photons device and color corresponding to photon energy the light is determined by bandwidth semiconductor power. The LEDs are typically small unless the integrated optical components can be used to match the radiation pattern.

LEDs are often used as remote control transmitters as those found on remote controls for a variety of consumer electronics visible light diodes were also low and limited to the red are often used as indicator lights for electronic devices that replace small light bulbs. They were soon packed in numerical readings in the form of seven segment screens and were usually seen in digital clocks suitable for environmental and work lighting LED has created screens and sensors while its high switching speeds are useful in advanced communications technology.

LED in front of incandescent lamps, including lower power consumption for longer service life, improved physical robustness, smaller size and faster switching. LEDs are used in applications that are as different as aerial lighting, vehicle lights that announce general lighting flash the camera flashes and tapes. LED lights house lighting is so cheap or cheaper than comparable output compact fluorescent lamps.

LED Flashlight
LED Flashlight

They are also significantly more energy efficient and may have fewer environmental considerations in connection with disposal. Unlike a laser, it is not coherent and monochromatic the color of the light emitted by an LED but the spectrum is narrow to the human eye and for most purposes in the light of an element of the simple diode can be considered monochromatic.