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
REPLACEMENT BULB FOR PHILIPS F13T5/COOL WHITE 13W | eBay
Philips 13-Watt 21 in. Linear T5 Fluorescent Tube Light Bulb Bright White (3000K) (1-Pack) 546481 - The Home Depot
Sunlite 05075-SU | 13W LED Fluorescent | 2700K
7 Watt T5 LED Ballast Bypass Mini Bi-Pin 700 Lumens 21 Inches Long 3000K Soft White - Replaces F13T5/WW