TOPHORT 1000W Digital Electronic Ballast for 1000W HPS MH Grow Light Bulb Lamp Ballast (1000W, Blue)
1000W 1150W Super Lumen Switchable MH HPS Digital Ballast 1000 Watt 240v | eBay
Amazon.com: iPower Horticulture 1000 Watt Digital Dimmable Electronic Ballast for Hydroponic HPS MH Grow Light with 200pcs Cable Tie of 8", 1000W : Everything Else