Light-emitting diode

A light-emitting diode, or LED, is a tiny electronic component that produces light when electric current flows through it, working through a completely different mechanism than traditional incandescent bulbs. Unlike old-fashioned bulbs that generate light by heating a filament, LEDs emit light directly from a semiconductor material, making them far more energy-efficient and longer-lasting. You'll find LEDs everywhere today, from smartphone screens and traffic lights to energy-saving home bulbs, because they're bright, durable, and use significantly less electricity than other light sources.