2-Pack F13T5/DL - T5 Fluorescent 6500K Day Light - 13 Watt - 21" Super Long | eBay
F13T5D – T5 21 Inch Under Counter Fluorescent Bulbs Bright White Daylight 6500K 13-Watt F13T5/D 21” D Long Life Replacement Tubes for Under Cabinet Lights – Pack of 6 Bulbs - - Amazon.com
CURRENT Linear Fluorescent Bulb: T5, Miniature Bi-Pin (G5), 4 ft Nominal Lg, 4100K, 54W LFL - 5AE35|F54W/T5/841/HO/ECO - Grainger