Light-Emitting Diodes (LEDs) are energy-efficient semiconductor devices that emit light when an electric current passes through them. Available in various colors, shapes, and sizes, LEDs are widely used for indicators, displays, lighting, and signaling applications. They offer numerous advantages over traditional light sources, including low power consumption, long lifespan, fast switching, and compact size. LEDs are found in everything from consumer electronics and automotive lighting to architectural illumination and digital screens. Their durability, efficiency, and versatility make them a cornerstone of modern lighting and display technologies.