Bulbrite F13T5WW 13-Watt Linear Fluorescent T5 Bulb Miniature, 3000-Kelvin, Mini Bi-Pin Base, 21-Inch, Warm White - Fluorescent Tubes - Amazon.com
Under the Cabinet 21" Fluorescent Light Bulb, 13W, Warm White, GE 25426, 1055278 | eBay
Ilc Replacement For GE GENERAL ELECTRIC GE F13T5WW WW-1XF3-4 | Zoro
Lighting-Gallery.net - Fluorescent, HID and incandescent lamps in operation/Showing 2 of my F13T5 lamps in my undercabinet fixture that gets a LOT of use after a year!
GE Cool White Miniature Bi-pin (T5) Light Bulb at Lowes.com
F13T5CW – T5 21 Inch Under Counter Fluorescent Bulbs Cool White 4100K 13-Watt F13T5/CW 21” CW Long Life Replacement Tubes for Under Cabinet Lights – Pack of 6 Bulbs - Amazon.com