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!
General Electric Lighting 10086 F13T5/CW - 21 in. 13 Watt - 4100K - 850 Lumens - Bi-Pin - T5 Fluorescent Tube - Amazon.com
Philips 13-Watt 21 in. Linear T5 Fluorescent Tube Light Bulb Cool White (4100K) (1-Pack) 546499 - The Home Depot
4+General+Electric+F13t5ww+21%22+Undercabinet+F13+T5+WW+Warm+White+GE for sale online | eBay
Bluex Bulbs 4 Pack T5 21 Inch LED F13T5WW LED Replacement Bulb F13T5 LED 9 Watts 920 Lumens Warm White 3000k F13 T5 13 Watt Bulb - Amazon.com