High-Intensity Discharge (HID) refers to a type of lighting technology that produces light by passing an electric current through a gas. This process creates a bright, intense light that is commonly used in outdoor and industrial applications, such as streetlights and stadium lighting. HID lamps are known for their efficiency and long lifespan compared to traditional incandescent bulbs. There are several types of HID lamps, including metal halide, high-pressure sodium, and mercury vapor. Each type has its own specific characteristics and uses, making them suitable for various environments. HID lighting is often favored for its ability to illuminate large areas effectively.