What Is Led Light

Leds are commonly green amber or red but they can be an assortment of other colors as they ve become popular with case lighting.

What is led light. Below are examples of how an led could be used with a computer. Although they are different than the traditional bulb led bulbs are available that can be put into traditional lamps and used. A light emitting diode led is a semiconductor device that emits visible light when an electric current passes through it. Led lighting is a lamp or other light that uses light emitting diodes leds as a source of illumination.

The output from an led can range from red at a wavelength of approximately 700 nanometers to blue violet. It is essentially the opposite of a photovoltaic cell a device that converts visible light into electrical current. A light emitting diode led is a semiconductor light source that emits light when current flows through it. There is a similar device to an led called an ired infrared emitting diode.

Electrons in the semiconductor recombine with electron holes releasing energy in the form of photons the color of the light corresponding to the energy of the photons is determined by the energy required for electrons to cross the band gap of the semiconductor. A light emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. Short for light emitting diode led is a semiconductor that illuminates when an electrical charge passes through it. Led lamps have a lifespan many times longer than equivalent incandescent lamps and are significantly more efficient than most fluorescent lamps with some manufacturers cree and others claiming led chips with a luminous efficacy of up to 303 lumens.