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.