... .No MOQ,work quiet Product Name 400w HPS/MH Grow Light Electric BallastOur Advantages:1, Timing Dimmer ballast2, High Power Factor ... %5, Open circuit protection, short circuit protection and overload protection6, Light weight, small size, easy establish, work quiet, 3 years warranty ... ×55920gXLDS-HPS-250W250W1.18A≥0.995≤6%166×93×551200gXLDS-HPS-400W400W1.91A≥0.995≤6%186×103×591450g Contact us:Tel ...