The Fulham Workhorse 5 is a UL-listed, heavy-duty electronic ballast designed for demanding industrial settings. The 120V, 128W ballast operates up to four lamps and features instant start capability and a high power factor. Dimensions are 8.4? x 1.73? x 1.01?. A five-year warranty is included. Also known as -Fulham WH5-120-L Fluorescent Electronic Ballast 128W, 120V-Fulham 10375 - WH5-120-L Fulham WorkHorse 5 Ballast-Electrical Tool Accessories: Fulham Electrical Supplies 128-Watt 120-Volt Fluore-Fulham Workhorse 5 for T5 HO fixtures, 128W/120V