F13T5D – T5 21 Inch Under Counter Fluorescent Bulbs Bright White Daylight 6500K 13-Watt F13T5/D 21” D Long Life Replacement Tubes for Under Cabinet Lights – Pack of 6 Bulbs - - Amazon.com
GE 13-Watt 21-in Miniature Bi-pin (T5) 4100 K Cool White Fluorescent Light Bulb in the Fluorescent Light Bulbs department at Lowes.com
Essential LED tubes T5 Mains | 6979513 | Philips lighting