Shat-R-Shield® Fluorescent Lamp, Straight, F40T12 C50 SUPREME/ALTO (PK X 30), 40 W, Linear Fluorescent Lamp, Bi-Pin G13 Medium Lamp Base, T12, 2545 Lumens, 24000 hr Average Life, C50 Supreme, 90 CRI, 5000 K Color, Copolymer Coated Lamp, 1-1/2 in Dia x 48 in L