Feit Electric FC8/3CCT/LED 8 in. (22W Replacement) Selectable White (T9 Replacement) Direct Replacement (Type A) Non-Dimmable Circular LED Light | BuyRite Electric
Philips 32-Watt 12 in. T9 Circline Linear Fluorescent Tube Light Bulb, Daylight Deluxe (6500K) (1-Pack) 262600 - The Home Depot
20" Curved Off-Road Light Bar - 120W Double Row Spot - 9600 lm | Super Bright LEDs
Philips 40-Watt 4 ft. Linear T12 U-Bend Fluorescent Tube Light Bulb Bright White (3500K) (1-Pack) 562966 - The Home Depot
Feit 32 W T9 12 in. D Circline Fluorescent Bulb Cool White Circular 4100 K 1 pk - Ace Hardware
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Westinghouse
How to change Circline Fluorescent Light Bulb - YouTube
Westinghouse 0601000 22 Watt T9 Circular Fluorescent Light Bulb 4100K Cool White 4-Pin Base
Lithonia Lighting 4 FT. 2-LIGHT CURVED BASKET WRAP LB232 MV - The Home Depot
Curved LED Filament T10 Tubular Vintage Light Bulb