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, …
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, …
LED | Definition, Light, & Facts | Britannica
Oct 13, 2025 · An LED (light-emitting diode) is a semiconductor device that emits infrared or visible light when charged with an electric current.
Light Emitting Diode (LED): What is it & How Does it Work?
Feb 24, 2012 · 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 …
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What is LED Lighting: Definition, Working Principle and Components
Jun 3, 2025 · 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 …
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 - Light Emitting Diode: Basics, Types and Characteristics
Sep 20, 2024 · As mentioned in the introduction, an LED is a semiconductor light source. It consists of a PN Junction Diode and when voltage is applied to the LED, electrons and holes …
What is LED ( Light Emitting Diodes ) | LED Lighting Supply
Dec 3, 2019 · Now that you know what an LED is, it is time to understand what LED bulbs are made of. LEDs need to be combined to increase the light output per bulb to suitable values.
What Is an LED? - How-To Geek
Aug 11, 2022 · LEDs are more efficient than traditional light sources because they don't use heat to produce light. Traditional light sources, such as light bulbs, produce light by heating a …