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

James Lighting Commonly used probe-start metal halide ballasts(MH) systems for mid-wattage MH lamps include high-reactance autotransformer (HX-HPF), constant-wattage autotransformer (CWA), constant-wattage isolated transformer (CWI), and regulated lag (magnetically regulated) metal halide ballastsHigh-reactance autotransformer (HX-HPF): These metal halide ballasts are similar in performance to reactor ballasts (discussed below), but their additional coils allow them to start the lamp from supply voltages that are lower than those necessary to start the lamps. As a result, these metal halide ballasts are bigger, heavier, and less efficient than reactor ballasts, but they can be used in a wide variety of applications, because they come with multitap capability. A typical current crest factor (CCF) range for these metal halide ballasts is 1.4 to 1.6. Most HX-HPF metal halide ballasts are rated to handle supply voltage variations of 5 percent, which results in a 9 to 12 percent lamp power variation.Constant-wattage autotransformer (CWA): Also known as lead style metal halide ballasts, CWA metal halide ballasts are the most common ballasts used on 175 W or higher MH lamps. This type of metal halide ballast has a different design than the reactor and high-reactance autotransformer (HX-HPF) ballasts. CWA metal halide ballasts offer better lamp power regulation, but they are heavier, larger, less efficient, and more expensive than reactor or HX-HPF styles. Constant-wattage isolated transformer (CWI): This metal halide ballast is similar to CWA design, but has an electrical isolation between the primary and secondary windings. They are very common in the Canadian market, but are larger and less efficient than CWA styles.Super constant-wattage autotransformer (SCWA): This two-coil metal halide ballastssystem is used to operate pulse-start MH lamps. High power factor is achieved by using a capacitor in series with the lamp. These metal halide ballasts have good lamp regulation and can handle voltage variations of up to 45 percent.Linear reactor pulse start: This single-coil reactor metal halide ballast, ignitor, and capacitor are used to operate a pulse-start MH lamp. It is available only in 277 VRegulated lag (magnetically regulated): This metal halide ballast design is the most sophisticated and provides the highest power regulation to the lamp. It provides a voltage regulation and circuit wave shape that is the most beneficial for lamp life and lumen maintenance. These metal halide ballasts are larger and less efficient than other types, but they should be used when large input voltage variation is expected. A typical CCF range for magnetically regulated metal halide ballasts is 1.4 to 1.6. They are rated to handle supply voltage variations of 10 percent or higher, which results in approximately 5 percent lamp power variation. In regions where line voltage variations greater than 10 percent are expected, however, they will not operate efficiently.