RAPID START ELECTRONIC BALLAST E220RS/120 FOR 2 LAMPS F20T12, F20T10, F18T8-24", F17T8, F15T12, F15T8, F14T12, F14T8 - 120 VOLT OPERATION - Bulborama offers premium quality Supra Life electronic ballasts, manufactured for optimum performance and high efficiency. Designed for T12 rapid start applications, Supra Life ballasts comply with OEM requirements and are regularly specified by architects and retrofit contractors.