China manufacturer of magnetic ballasts for metal halide flood lights & hps flood lights

high-pressure sodium lamps, metal halide lamps, mercury lamps are gas discharge lamps, mercury lamps and metal halide lamps inside are filled with mercury vapor, xenon and argon, but mercury metal halide more than one thing - metal halide material, commonly known as metal halide pills.

Mercury and metal halide same principle, are used as quartz glass discharge tube. Because it is two kinds of mercury vapor lamps have sent nearly white light, luminous efficiency generally 75lm / W. HPS inside filled with sodium amalgam, mercury vapor and xenon, sodium amalgam issue because it is golden brown. Conventional street with a maximum luminous efficiency generally have 120lm / W, because the high temperature sodium vapor can corrode glass, it is generally used as a sintered alumina ceramic discharge tube and prolong life.

The above three lights are needed magnetic ballast and ignitor the cascade to work properly, but mercury can not trigger light, so very early filament instead of ballast for ease of use and improve light efficiency self-ballasted mercury