What is the different of an incandescent light and an LED light?

Answer 1

Incandescent Lights are basically a glass cover inside which there is an inert gas, like nitrogen, argon (low wattage ones use no gas, just a vacuum)... and there is a filament which gets heated when current passes through it... the hot filament emits light and heat... whereas an LED doesn't have gases (or a vacuum) or a heated filament... it has a semiconductor junction which emits light directly by diffusion and recombination of electrons and holes.... thus it produces less heat... and its life is much longer.

Answer 2

The differences are large...

Incandescent bulbs heat a filament so hot it glows and creates light. Light quality is just OK. They last 1000-2000 hours.

A compact fluorescent lams (CFL) ionizes Mercury atoms, and their electrons emit ultraviolet (UV) light as they return to the lower energy levels they came from. This UV light strikes the coating on the inside of the tube, and it stimulates the emission of visible light. Worst light quality. Lasts 4000-6000 hours.

A light emitting diode (LED) doesn't contain filaments or raw elements, and pass electrons across a semiconductor junction (a p-n junction). LEDs create light directly from the movement of those electrons. Best and most natural light. Lasts 25000 - 50000 hours.

Answer 3

CF = Compact Flourescent. The inside of glass tubes are coated with phosphorous and an electric current is passed through a cathode to "excite" a small amount of mercury that is also there. The phosphorous then converts the ultra-violet light created by the mercury into light that is visible to the human eye. There's more to it than that, but that's the basic principle.

LED = Light Emitting Diode. They're semiconductors, and quite similar to transistors, but "emit" light when an electric current is passed through. No phosphorous involved. They operate at very low voltage, typically somewhere around 3 V. If they are used in standard light sockets then there is additional circuitry to convert line voltage to 3 VDC.

Answer 4

Incandescent lights produce light by heating a filament inside the bulb, while LED lights produce light through the movement of electrons in a semiconductor material. LED lights are more energy-efficient, longer-lasting, and produce less heat compared to incandescent lights. LED lights are also available in a wider range of colors and are more environmentally friendly.

Answer 5

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