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, thereby …
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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 microchip, which …
Light Emitting Diode: How LEDs Work, How to Use LEDs
Jun 12, 2025 · Learn what a light emitting diode is, how LEDs work, and how to use them in electronics projects. Includes history, applications, tips, and FAQs.
LED | Definition, Light, & Facts | Britannica
Jan 2, 2026 · LED, in electronics, a semiconductor device that emits infrared or visible light when charged with an electric current. LED displays began to be used for consumer electronic devices …
What is an LED? | All About LEDs | Adafruit Learning System
Feb 11, 2013 · In fact, the first two letters of LED stand for Light Emitting. A really nice thing about LEDs is that they are very simple. Unlike some chips that have dozens of pins with names and special …
Light Emitting Diodes (LED) Information - GlobalSpec
Nov 18, 2024 · Light emitting diodes (LEDs) are PN junction devices that give off light radiation through electroluminescence when forward biased. They are used as various indicators in aviation, …
Everything You Need to Know About LEDs - YouTube
Sep 25, 2025 · LEDs are everywhere, from phone screens and flashlights to TVs and car headlights. But how do they actually work, and why are they so efficient compared to o...
LED Basics - Department of Energy
Unlike incandescent lamps, LEDs are not inherently white light sources. Instead, LEDs emit nearly monochromatic light, making them highly efficient for colored light applications such as traffic lights …
Introduction to LEDs - Lighting Design Lab
LEDs are solid state semiconductor devices. LED illumination is achieved when a semiconductor crystal is excited so that it directly produces visible light in a desired wavelength range (color).