... ,Work quiet US/HK/China paten Product nameDimmable 400W Ballast for grow light HydroponicXLDS Characteristics1, Size: 186*93*59 mm2, Weight: 1 ... protection, low voltage protectionConstant performance, prolong the lamp life-span Light weight, small size, easy establish, absolute quiet, 3 years ... -731- 85505477Email: surre[at] intelligon.cnContact: surre Dimmable 400W Ballast for grow light Hydroponic