Light Emitting Diodes, or LEDs, are semiconductor devices that emit light when an electric current passes through them. They are highly efficient and have a long lifespan compared to traditional incandescent bulbs, making them a popular choice for various lighting applications, from household fixtures to large-scale displays. LEDs come in various colors and sizes, and they are used in everything from indicator lights to television screens. Their energy efficiency and low heat output contribute to their growing use in energy-saving technologies, helping to reduce electricity consumption and environmental impact.