Metal halide lamps are a type of high-intensity discharge (HID) lighting that produce bright, white light. They contain a mixture of gases, including metal halides, which are compounds formed from metals and halogens. When electricity passes through the gas, it creates an arc that generates light, making these lamps suitable for outdoor and industrial applications. These lamps are known for their excellent color rendering and efficiency, often used in sports facilities, street lighting, and commercial spaces. However, they require a warm-up period to reach full brightness and can have a shorter lifespan compared to other lighting options like LEDs.