Keystone Technologies 22-Watt 1-Lamp T9 Preheat Electromagnetic Fluorescent Replacement Ballast

Keystone Technologys T9 Preheat electromagnetic ballast is designed to operate 1 Circle line lamp. Featuring 120-Volt input and high-power factor design. See the document below for complete specifications including additional lamp wattages compatible with this ballast.|Sound rated: A|Minimum starting temperature: 32 degree F, 0 degree C|Maximum case temperature: 194 degree F, 90 degree C|UL, cUL 935 Listed (class P, outdoor, type 1)|Thermal protection