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 …

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 …

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.

LEDs, or Light Emitting Diodes, are the single most common way to add light to your project. If you want something to glow, blink, flash, or otherwise add some light to your life, an LED is what you need! …

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 …

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).

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...

Aug 11, 2022 · You can't go anywhere these days without hearing about LEDs, whether in TV sets, light bulbs, smartphones, or otherwise. But what are they, and how are they different from other light …

Compared with conventional light sources that first convert electrical energy into heat, and then into light, LEDs (Light Emitting Diodes) convert electrical energy directly into light, delivering efficient light …

LED is a highly energy-efficient lighting technology, and has the potential to fundamentally change the future of lighting in the United States. Residential LEDs -- especially ENERGY STAR rated products - …