Bluex Bulbs BlueX LED 50-Watt EQ 4-in Daylight Miniature Bi-pin (t5) Circline Type A or Type B LED Tube Light Bulb in the LED Tube Light Bulbs department at Lowes.com
TL5C 55W/840
LEDvance 55watt Colour 830 Warm White T5 Circular Tubes
SYLVANIA T5 Circline Fluorescent Tube Light Bulb, 40W, Soft White Color Temperature, 1 pack - Fluorescent Tubes - Amazon.com
Feit Electric Color select 30-Watt EQ 9-in Cool White G24q-2 Pin Base Circline Type A LED Tube Light Bulb in the LED Tube Light Bulbs department at Lowes.com
2 X BELL T5 CIRCULAR FLUORESCENT TUBE T5 55 WATT COL 865 2GX13 CIRCLINE DAYLIGHT | eBay