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, …
LED | Definition, Light, & Facts | Britannica
Jan 2, 2026 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.
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 …
Light Emitting Diode: How LEDs Work, How to Use LEDs
Jun 12, 2025 · LED lights refer to energy-efficient lighting devices used in homes, vehicles, streetlights, signage, and electronic displays. They consume less power and last significantly …
What is LED ( Light Emitting Diodes ) | LED Lighting Supply
Dec 3, 2019 · LED Lighting Supply experts explain how LEDs work & their advantages over traditional bulbs. Learn about P-N junction technology, band gaps, wavelengths & why LEDs …
Light Emitting Diode (LED): Principle, Advantages, and Uses
Jun 10, 2025 · 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 Basics | LED Types, Colors and Applications
Sep 16, 2024 · This article is composed as a brief understanding guide to LED, which includes a brief introduction, the electrical symbol of LED, types, construction, characteristics, LED …
What is an LED (Light Emitting Diode)? - GoPhotonics.com
Mar 7, 2025 · An LED, or light-emitting diode, is a semiconductor device that produces light due to the recombination of electrons with holes when an electric current pass through it. This solid …
Light Emitting Diode (LED): What is it & How Does it Work?
Feb 24, 2012 · Light Emitting Diode (LED): What is it & How Does it Work? LED Definition: A Light Emitting Diode (LED) is a semiconductor device that emits light when electric current flows …
LEDs: What Are They? (Definition, Types, and Uses)
Mar 12, 2021 · A LED or light-emitting diode is an electrical component that produces light when current passes through it. LEDs are semiconductor devices, light is produced when the …