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

HID lamp (High Intensity Discharge), which means it provides most of its light from the electric arc within a small discharge tube. It is becoming increasingly popular due to its good quality white light and good efficiency. The most prominent use of the MH lamp is in stadiums and sports fields. It is also used widely for parking lots and street lighting in urban areas. Its competitors include the HPS lamp, mercury vapor lamp, LPS lamp, halogen lamps, and LEDs. MH lamps have advantages over the rest which make it more useful for certain applications.
All High Intensity Discharge (HID) lamps and replacing them with energy efficient alternatives such as linear fluorescent, compact fluorescent, induction lamps or LED lamps. Proponents of this wholesale shift away from HID claimed low efficiency, poor color, quick lamp lumen depreciation among the failures of HID. Some of the claims were valid for fixtures with magnetic ballasts, also known as core and coil ballasts. Some of the claims do not take into account deficiencies of fluorescent and LED technologies. However, if you include in the conversation electronic HID ballasts with pulse start Metal Halide lamps, particularly Ceramic Metal Halide lamps, HID is still the best high bay lighting solution on the market when all things are considered.
The HID ballast provides the proper starting voltage, operating voltage and current to the lamp to initiate and sustain the arc. HID lamps have a negative resistance characteristic, which causes them to draw an increasing amount of current, hence need a current limiting device. The ballast provides these functions. There are several different ballast types used for for HID lighting. Basically, there are two primary distinctions between ballasts: "lag circuit" and "lead circuit" ballasts. The current in lag type ballasts is controlled by an inductive resistance in series with the lamp, whereas in lead type ballasts it current control is provided by both inductive and capacitive resistances in series with the lamp.