... ballast 1.Works reliable,prolong bulb life 2.Constant power output 3.Self-protections 4.No MOQ,work quiet ... Energy-consumption, Timing Dimmer ballast2, High luminescence efficiency3, High Power Factor, Low THD4, Wide operating voltage range5, Quakeproof, ... overload protection8, Ignition failure protection, low voltage protection9, Constant performance, prolong the lamp life-span10, Light weight, ...