Philips 13-Watt 21 in. Linear T5 Fluorescent Tube Light Bulb Cool White (4100K) (1-Pack) 546499 - The Home Depot
13W 21" Linear T5 Pre-Heat Fluorescent Lamp Daylight
NovaLux 13W LED T6 Fluorescent Tube Replacement, Direct Wire, 5000K (NovaLux 90429) | HomElectrical.com
Satco 13W T5 21 Inch Soft White 2 Pin Fluorescent Tube Light Bulb - FLO10025 at Batteries Plus
Philips 13W 21 In. Bright White T5 Miniature Bi-Pin Fluorescent Tube Light Bulb, 1 - Kroger
SUNLITE 13w T5 Straight Tube 2G5 Mini Bi-Pin Base Soft White Fluoresce – BulbAmerica
Bluex Bulbs 4 Pack T5 21 Inch LED F13T5CW LED Replacement Bulb F13T5 LED 9 Watts 920 Lumens Cool White 4100k F13 T5 13 Watt Bulb - Amazon.com
F13T5CW – T5 21 Inch Under Counter Fluorescent Bulbs Cool White 4100K 13-Watt F13T5/CW 21” CW Long Life Replacement Tubes for Under Cabinet Lights – Pack of 6 Bulbs - Amazon.com
Tube Fluorescent T5 IN Strip Ultrafine White 8w 13w 21w Switch Bulb | eBay