1 Dimmable:3 phase manual dimming, 100%,75%,50% ... 370*180*107mm12 Weight: 6kgs13 Color: blue, silver, black14 Dimmable: 3 phase manual dimming, 100%, 75%, 50%15 Prolong ... Good regulation against supply voltage variation19 Constant wattage output20 Ballast noise rated class AThermal protection at 105C and ... flicker CE, FCC, UL, CUL, ROHS are available. Electronic Ballast for metal halide lamp 1000W