A Light-Emitting Diode, or LED, is a small electronic device that produces light when an electric current passes through it. Unlike traditional light bulbs, which use filaments, LEDs are energy-efficient and have a longer lifespan. They are commonly used in various applications, from household lighting to electronic displays, due to their bright illumination and low power consumption. LEDs work by using a semiconductor material that emits light when electrons move through it. This process is called electroluminescence. Because of their versatility, LEDs can be found in everything from TV screens to traffic lights, making them an essential part of modern technology.