Feit Electric Color select 22-Watt EQ 8-in Cool White G24d-2 Pin Base Circline Type A LED Tube Light Bulb in the LED Tube Light Bulbs department at Lowes.com
Circular Fluorescent Standard - lamptan
FC8T5 22W Watt Circular Fluorescent Lamp 7.25" Inch Light Bulb Daylight White | eBay
REPLACEMENT BULB FOR JANA-LITE FC22W/D 22W | eBay
22W Circline T5 Fluorescent Light Bulb Replacement for Light Bulb/Lamp Fcl 22w/t5 by Technical Precision - Vanity Mirror Circular Bulb - G10Q-4 4-Pin Base - 6500K Daylight - 1 Pack
Feit Electric 8 in. 15-Watt (22-Watt Equivalent) T9 Cool White 4100K G10Q Circline LED Light Bulb (4-Pack) FC8/840/LED/4 - The Home Depot
20 Replacement Circular Lamptan Lamp Very High Quality, 22w T9, Model Fcl- 22w-t9 | eBay