... MOQ,Work quiet US/HK/China patents Product name400W Dimmable Ballast for Hydroponic grow lightXLDS Characteristics1, Size: 186*93*59 mm2, ... : -30 ~ +50C / -22~+122FOur Advantages: Low Energy-consumption, Timing Dimmer ballast High Power Factor, Low THD; Energy-saving up to 15 ... size, easy establish, absolute quiet, 3 years warranty period 400W Dimmable Ballast for Hydroponic grow light