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

The term High Intensity Discharge or HID describes lighting systems that produce light through an  electrical discharge which typically occurs inside a pressurized arc tube between two electrodes. In general, these systems feature long life, high light output for the size of the lamp and increased efficiency compared to fluorescent and incandescent technologies. HID lamps are named by the type of gas and metal contained within the arc tube. There are five different families of HID:
Mercury Vapor, High Pressure Sodium, Quartz Metal Halide, Pulse Start Quartz Metal Halide, and
Ceramic Metal Halide. HID lamps come in various shapes and types, such as elliptical and tubular. The lamp bases come
in various shapes and types as well, such as screw base, double ended, bi-pin and many others. See the lamp catalog for more information.

HID lamps require a ballast to operate. Typically, the HID ballast (sometimes with the addition of a capacitor and igniter) serves to start and operate the lamp in a controlled manner. Ballasts are not subjected to very high voltages when used in superimposed ignitor circuits and, therefore, all normally available ballasts are suitable. The ignitor taps provided on some ballasts are not required, and should not be used in conjunction with superimposed pulse type ignitors.