New! This compact fluorescent ballast from Advance Ballast is a reliable and efficient choice for your lighting needs. With a wattage of 18 and a voltage of 120, it is suitable for a variety of lighting applications. The ballast is designed to fit comfortably in a 2-lamp socket and has a height of 2.50 inches, a length of 5.00 inches, and a width of 1.00 inches.