Light-emitting diode - Wikipedia
In electrical engineering, a light-emitting diode (LED) is a semiconductor device that emits light when current flows through it. Electrons in the semiconductor recombine with electron holes, …
Learn About LED Lighting - ENERGY STAR
LED stands for light emitting diode. LED lighting products produce light up to 90% more efficiently than incandescent light bulbs. How do they work? An electrical current passes through a …
LED | Definition, Light, & Facts | Britannica
2025年11月25日 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.
What is LED Lighting: Definition, Working Principle and ...
2025年6月3日 · Unlike traditional incandescent bulbs or fluorescent lamps, an LED is a semiconductor device that emits light when electrical current passes through it in the forward …
LED Lighting - Department of Energy
The light-emitting diode (LED) is today's most energy-efficient and rapidly developing lighting technology. Quality LED light bulbs last longer, are more durable, and offer comparable or …
Light Emitting Diode (LED): Principle, Advantages, and Uses
2025年6月10日 · A light-emitting diode (LED) is a small electronic device that emits light when an electric current flows through it. LED works by passing electricity through a semiconductor, …
Light Emitting Diode (LED): What is it & How Does it Work?
2012年2月24日 · What is a Light Emitting Diode (LED)? A Light Emitting Diode (LED) is a special type of PN junction diode. The light emitting diode is specially doped and made of a special …