Compact model with side leads Instant Start UL listed for the outdoors The contractor's best friend, the workhorse family of ballasts are designed to run dozens of lamp types in hundreds of combinations.Brand Fulham MPN (Part No.) WH33-120-C UPC 872180100753 Lighting Technology Fluorescent Family Workhorse 33 Voltage 120 Ratings and Certifications Indoor/Outdoor/UL Ballast Factor 0.87 Maximum Current 0.53 Amp Maximum Power 64 WattsStart Temp. (Min) -20 Deg. F Power Factor 90% Start Method Instant Start Type Electronic Fluorescent Length 3.82 in. Height 1 in. Width 3.1 in. Weight 0.625 lbs.