Keystone 4Ft. LED T5 Tube, Ballast Bypass, 13W, 3500K, F28T5 Fluorescent Replacement | LED Lighting Wholesale Inc.
F13T5 13W 21 Inch T5 Fluorescent Light Bulb | 4100K Cool White Medium Bi-Pin Base | 740 Lumens 65 CRI 6000 Life Hours | Instant/Programmed Start | 20 Pack by GoodBulb - 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
5 x 21" 13W T5 Fluorescent Tube 535 [3500k] Standard White (Crompton) - - Amazon.com