... to 30% compared with 1Model: NB-HPS/MH1000W 2Suitable for 1000W HPS and MH bulb of America and Europe ... function: short-circuit protection, circuit protection, overheatprotection, lamp failure protection.18 Good regulation against supply voltage variation19 ... at 55 degree CelsiusElimination of lamp flicker CE, FCC, UL, CUL, ROHS are available. Electronic Ballast for metal halide lamp 1000W