CWA Ballast: 1. Certificates: CE, ROSH, CCC, TUV 2. ISO9001, ISO14001 3. We can supply all CWA type ballasts within 1000W. CWA Ballast for lighting.Power: 250WInput: 220V~50HzRating Current: 3.0AMax. Short Circuit Current: 5.2A Power range of constant power ballast for metal halide lamps is 175W-2000W,They have the features of unique design, great capacity of resisting fluctuation of voltage, ...