Metalux, 4, 1 Lamp, T12, Narrow Commercial Strip Fluorescent Light, 120V Low Trigger Start Magnetic Ballast, Pre-Wired Sockets Ship Installed In End Caps & Flip Up To Lock In Place, Commercial Ballast, Linear Disconnect System, Uses One 40W Or One 34W Bi-Pin T12 Lamp, Not Included, UL Listed.