F13T5WW – T5 21 Inch under Counter Fluorescent Bulbs Warm White 3000K 13-Watt F1 | eBay
GE Cool White Miniature Bi-pin (T5) Light Bulb at Lowes.com
21 Inch T5 Fluorescent Light Bulb 13 Watt F13T5/WW Compatible for Sylvania Satco Philips GE Under Cabinet Tube Light Warm White 800 Lumen G5 Base 8 Count - Amazon.com
6 Pack) F13T5/WW - T5 Fluorescent 3000K Warm White - 21" Linear - 13 Watt T5 - Under The Counter Light Bulbs - Amazon.com