Philips 13W 21 In. Bright White T5 Miniature Bi-Pin Fluorescent Tube Light Bulb, 1 - Kroger
Lightwise LWL7W40-F13T5 21" Direct Replacement Led Tube, 7-Watt, White, 4000K, Retrofit 13W T5 Fluorescent Tube of your Uncder-Cabinet Lights 50% Energy Saving, Replace Directly Set of 3 - - Amazon.com
Keystone 4Ft. LED T5 Tube, Ballast Bypass, 13W, 3500K, F28T5 Fluorescent Replacement | LED Lighting Wholesale Inc.
Pack of 2) F13T5/CW 13-Watt T5 Fluorescent Cool White 4100K Super Long Life - - Amazon.com
13W T5 Fluorescent - Warm White F13T5/WW | Lite Source Inc.