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
General Electric 10086 21 in. 13W Cool White Linear Fluorescent T5 Light Bulb - Walmart.com
Keystone KT-LED13T5HE-48GC-865-D Direct Drive 4' 13W LED T5 Tube 6500K