Bulbrite F39T5 841/HO 39-Watt High Output Linear Fluorescent T5 Bulb, 800 Series, 4100-Kelvin, Mini Bi-Pin Base, 3-Inch 3500 lumens Long Life (24,000 hours) 34-Inch Pin-to-Pin MOL Mini Bi-Pin base Available in a variety of wattages and color temperatures