Electronic Replacement Ballast for Aquarium Hoods and many other Aquatic fluorescent systems - Operates 1 F20T12/F15T8 or the following lamps F14T8, F14T12, F15T12,F17T8,F18T8, and FC8T9. This ballast operates on 120 Volts, minimum starting temp is 0 F, 2 red wires, 2 blue wires, 1 black, 1 white. Size 3.07 inches long by 1.56 inches wide. The Interglobal ballast IG13-20EL is an electronic ballast.