400 or 600 Watt Digital Ballasts. http://www.hydroponicsgroup.com Our 400 or 600 watt digital ballasts are matched to our Metal Halide (MH) and High Pressure Sodium (HPS) bulbs to give you optimal lighting for your growing needs. These digital ballast are internally cooled by fan and offer three dimmer settings. Can be used with our Master Control Timing System.
Tags: 400 or 600 Watt Digital Ballasts, 400 Watt Digital Ballast, 600 watt digital ballast, MH Metal Halide Ballast