400W Electronic ballast 1.Works reliable,prolong bulb life 2.Constant power output 3.Self-protections 4.No MOQ,work quiet Product NameHydroponics 400W Grow tent kits ballast systemsOur Advantages:1, Low Energy-consumption, Timing Dimmer ballast2, High luminescence efficiency3, High Power Factor, Low THD4, Wide operating voltage range5, Quakeproof, Anti-jamming6, Energy-saving up to 15%-45%7, Open ...