Metal Halides, High Pressure Sodium, Mercury Vapor
High Intensity Discharge (H.I.D.) are lamps in which an arc passing between two electrodes in a pressurized tube causes various metallic additives to vaporize and release large amounts of light. Three types of lamps are currently available on the market: Mercury Vapor, Metal Halide, and High Pressure Sodium. All three types offer outstanding energy efficiency and service life.