What Is Led Light

Some types of led lights are self contained fixtures with no bulbs to replace.

What is led light. How do they work. A light emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. Led lamps have a lifespan many times longer than equivalent incandescent lamps and are significantly more efficient than most fluorescent lamps 1 2 3 with some manufacturers cree and others claiming led chips with a luminous efficacy of up to 303 lumens per watt. Although they are different than the traditional bulb led bulbs are available that can be put into traditional lamps and used like most other light bulbs.

Led is a highly energy efficient lighting technology and has the potential to fundamentally change the future of lighting in the united states. 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. Most lighting comes from an incandescent or fluorescent light bulb.

An led lamp or led light bulb is an electric light for use in light fixtures that produces light using one or more light emitting diodes leds. Residential leds especially energy star rated products use at least 75 less energy and last 25 times longer than incandescent lighting. There is a similar device to an led called an ired infrared emitting diode. Led lighting is a lamp or other light that uses light emitting diodes leds as a source of illumination.

Led lighting is an energy saving alternative to traditional incandescent bulbs. Led stands for light emitting diode. Led light bulbs can be used as replacement bulbs in most common light fixtures including accent lighting lamps track lighting and even outdoor flood lights. 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.

An electrical current passes through a microchip which illuminates the tiny light sources we call leds and the result is visible light. These lights have been in use since the 1960s but people have only recently begun to use them as a skin treatment.