Pack of 2) F13T5/WW 13-Watt T5 Fluorescent Warm White 3000K Light Bulb 20,000-Hour - - Amazon.com
GE Replacement 13-Watt EQ 21-in Color Select Linear Type A LED Tube Light Bulb in the LED Tube Light Bulbs department at Lowes.com
TOPAZ 70799: $11.95 L4T5E/850/13/F: 48" 13W LED T5 TUBE DIRECT REPLACEMENT 5000K 120-277V. CASE OF 25 751338017245
LED 13W 4' T5 BYPASS 50K SC | LED Tubes | TCP Lighting
MaxLite 4-ft 13W LED T5 Tube, Dual End, Direct Line Voltage, 5000K (MaxLite L13T5DE450-CG) | HomElectrical.com
GE 10086: $4.99 F13T5/CW: 21'' 13W T5 FLUORESCENT TUBE COOL WHITE. CASE OF 24 043168100861
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