... .20W,35W,70W,150W,250W for Metal Halide lamps with CE, ROHS,ISO9001 in China. Some of ballasts also get ROSH and ... protectionyesshort-circuit protectionyesover warm protectionyes≥20000hours-15°C ~ +55°Cstorage temperature-20°C ~ 80°CsaftyGB19510.13-2007 EN61347-1:2008 EN1347 ... life is short, the need to replace frequent maintenance, easily damaged lampsOrdinary electronic ballast50°C0.5~0.6Less or no1 ...