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
Xenico 13w T5 Linear Fluoro Tube 4000K Natural White - Galaxy Lighting & Fans
Philips 13-Watt 21 in. Linear T5 Fluorescent Tube Light Bulb Cool White (4100K) 546499 - The Home Depot
21" 13w T5 Cool White 840 4000K Foodsafe Fluorescent Tube for Food Industry 742939669575 | eBay