Keystone KT-LED13T5HE-48GC-840-D $23.89 Led T5 Tubes, 13W, 40K, 1800 Lumen, 4 Ft., Ba | Zoro.com
LED Linear T5 Ballast Compatible 48", 3500K, Frosted
TCP 21841 - LED 13W 4' T5 BYPASS 41K SC 4 Foot LED Straight T8 Tube Light Bulb for Replacing Fluorescents - Walmart.com
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