GE260ISMV-N-DIYB, Electronic 2 Lamp Ballast For The Following Bulbs: F96T12, F84T12, F96T12/WM, F72T12, F96T12/WMP, F64T12, F60T12, F48T12, Starting Temperature -20 Degrees Fahrenheit, Normal Ballast Power Factor, .87-.98, 9.5"L x 1.7"W x 1.2"H, High Efficiency Multi-Volt 120-277, Instant Start.