Radionic D2813 Electronic Ballast: Use with (1 or 2) F13T5 and/or F8T5 Radionic Electronic ballast. Use with (1 or 2) F13T5 and/or F8T5 Fluorescent Lamp With Lead Wires Attached Normal Power Factor, Soft Start, End of Life Protection 5 Year Manufacturer's Warranty 120VAC, 50/60Hz, FCC B, Class P