11W T4 Round Annular Tubes Lamps Bulb Fluorescent Ring Lamp Tube With 4 Pins - Walmart.com
2 x 22W T5 Circular Fluorescent Tubes Lamps 2700K Warm White 1300Lm | eBay
Feit Electric Color select 32-Watt EQ 12-in Cool White G24q-2 Pin Base Circline Type A LED Tube Light Bulb in the LED Tube Light Bulbs department at Lowes.com
SUNLITE 14in White Round Plastic Cover for AM32 Circline Fluorescent F – BulbAmerica
Circular Fluorescent Light Bulb 10 W - LAMP12/10
913818-3 GE Lighting 22 Watts Circular Fluorescent Lamp, T9, 4-Pin (G10q), 1100 Lumens, 4100K Bulb Color Temp. | Imperial Supplies
FC8T9/CW Circular Fluorescent Light Bulb, 8 Inch Circline T9 22W Lamp Tube Replacement for Round Ceiling Fixture, Circle Cool White Bulb 4100K 1350 Lumens, G10q 4 Pin Base, 2 Pack - Walmart.com
AMATRON ETL Listed 16" T9 24W LED Circline Bulb LED Circular Tube 5000K Daylight Frosted Lens with Non-Dimmable External Power Driver to Replace 16 inch 40W Fluorescent Circline - Led Household Light