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science.howstuffworks.com/.../sustainable/led-light-bulb.htm

In some ways, LED light bulbs are a perfect technology. But they still have a way to go before they become the higher-efficiency bulb of choice. In this article, we'll find out why. We'll look into how they work, why they're a desirable lighting choice, and what will have to change before the rest of us start using them in our bedside lamps.

www.explainthatstuff.com/diodes.html

But, even better, there are LEDs (light-emitting diodes) that are just as bright as bulbs, last virtually forever, and use hardly any energy at all. An LED is a special type of diode (a type of electronic component that allows electricity to flow through in only one direction). Diodes have been around for many decades, but LEDs are a more ...

electronics.howstuffworks.com/led.htm

The lifespan of an LED surpasses the short life of an incandescent bulb by thousands of hours. Tiny LEDs are already replacing the tubes that light up LCD HDTVs to make dramatically thinner televisions.

www.eslightbulbs.com/how-do-led-light-bulbs-work

An LED is a small light bulb that easily fits into an electrical circuit. These light bulbs do not get hot and they are illuminated by the constant movements of the electrons located in the semiconductor material. The average life of an LED is around 50,000 hours, and it surpasses the life of the typical incandescent bulb by several tens of thousands of hours.

www.energystar.gov/.../light_bulbs/learn_about_led_bulbs

What are LEDs and how do they work? LED stands for light emitting diode. LED lighting products produce light approximately 90% more efficiently than incandescent light bulbs. How do they work? An electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs and ...

www.toppr.com/bytes/principles-of-led

The two terminals (anode and cathode) of a LED when connected to a voltage source in the correct polarity, may produce lights of different colors, as per the semiconductor substance used inside it. Working Principle: A light-emitting diode is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated.

sewelldirect.com/learning-center/led-light-bulbs

When you consider the average lifespan of each however, you begin to think LED light bulbs are pretty attractive: incandescents last around 2,000 hours, and LED light bulbs last 25,000 hours, outlasting incandescents by a lot more than 10 times. So, if you plan on using the bulb for 10 years or more, you’ve already reclaimed your investment.

science.howstuffworks.com/.../sustainable/led-light-bulb1.htm

An LED is what's called a "solid-state lighting" technology, or SSL. Basically, instead of emitting light from a vacuum (as in an incandescent bulb) or a gas (as in a CFL), an SSL emits light from a piece of solid matter. In the case of a traditional LED, that piece of matter is a semiconductor ...

www.youtube.com/watch?v=qYwxoGu-2NQ

Manufacturers now offer a wide range of solutions which will not only save you olney but help create the perfect light for every room in your house, place of work, retail oulet or leisure venue.

insights.regencylighting.com/what-is-an-incandescent-light...

What is an incandescent light bulb? Basically, an incandescent light bulb is a controlled fire on display. When electrical current makes contact with the base of the bulb, electricity enters and heats the tungsten filament housed inside. And when the filament heats up, “incandescence” is created, which is light produced by heat.