Sunlite 40110-SU SB132C120 1 Lamp F16T9 or F12T9 Fluorescent Circline Ballast, 120-volt Size: 1 Pack Model: SB132C120 Tools & Home Improvement Use With F16T9 40 Watt & F12T9 32 Watt Lamp Voltage 120 60Hz, UL Listed Electronic Ballast - Rapid Start