LED stands for light‑emitting diode. These tiny semiconductor diodes convert electrical current into light. Depending on the semiconductor material and the applied voltage, an LED can emit any color—including ultraviolet and infrared wavelengths. Modern LEDs come in a range of sizes and power levels, from miniature indicators to high‑brightness fixtures and multicolor displays.
Unlike incandescent bulbs, LEDs do not rely on a filament. Electroluminescence occurs when electrons cross the p‑n junction of the semiconductor. The energy released during this transition appears as photons, which we perceive as visible light. Because the process is purely electronic, LEDs are far more efficient and durable.
LEDs are integral to everyday electronics: traffic signals, monitor panels, computer displays, automotive brake lights, and portable devices. Their low heat output makes them ideal for high‑temperature environments, and they are increasingly used in photonic textiles and flexible lighting solutions. As a result, LED technology remains essential for modern, energy‑efficient lighting and display systems.
