... bulb life 2.Constant power output 3.Self-protections 4.No MOQ,work quiet Product NameHydroponics 400W Grow ... luminescence efficiency3, High Power Factor, Low THD4, Wide operating voltage range5, Quakeproof, Anti-jamming6, Energy-saving up to 15 ... circuit protection and overload protection8, Ignition failure protection, low voltage protection9, Constant performance, prolong the lamp life-span10, Light ...