Satco S1907 13w T5 F13T5/WW Soft White 21 inch Preheat Fluorescent Tub – BulbAmerica
OCSParts F13T5/WW 13-Watt T5 Fluorescent Warm White 2700K, (Pack of 2) - Walmart.com
Sylvania 13w F13T5/SW Soft White 21 inch Preheat Fluorescent Tube Light - Amazon.com
Pack Of 6 F13T5/WW - T5 Fluorescent 3000K Warm White - 13 Watt - 21" Super Long for sale online | eBay
Bluex Bulbs BlueX LED 60-Watt EQ T5 Cool White Miniature Bi-pin (t5) LED Light Bulb (4-Pack) in the General Purpose Light Bulbs department at Lowes.com