Sylvania OCTRON® CURVALUME® U-Bent Fluorescent Lamp, FBO31/841 Designation, 31 W Wattage, Fluorescent Lamp, Medium Bi-Pin Lamp Base, T8 Shape, 2725 Lumens, 20000 hr Average Life, 82 CRI, 4100 K Color Temperature, Phosphor Coated Lamp, Rapid Start, Magnetic Ballast, 1 in Dia x 22-1/2 in L Dimensions