Bulbrite F54T5 835/HO 54-Watt High Output Linear Fluorescent T5 Bulb, 800 Series, 3500-Kelvin, Mini Bi-Pin Base, 4-Inch 4500 lumens Long Life (24,000 hours) 45.8-Inch Pin-to-Pin MOL Mini Bi-Pin base Available in a variety of wattages and color temperatures