Sylvania 21-Watt 35 in. Linear Tube T5 Fluorescent Light Bulb Bright White (2-Pack)-23529 - The Home Depot
LWL4W40-F8T5 12“ 4Watts White LED T5 Tube with 4000K to Retrofit for 8W T5 Fluorescent Tube of Your Under-Cabinet Lights to get Over 50% Energy Saving! Replace Directly! F8T5-LED4W40 (8) - -