Caprock FC22T5/865 22W 22 Watt 7.25 inch Diameter Circular Fluorescent lamp/Bulb for Magnifying Lamps - Amazon.com
GEL33774 Circular GE Fluorescent Light Bulbs | OnTimeSupplies.com
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
22W/32W T5/T9 Circular Fluorescent Tube with Ballast - China Circular Lamp, Circular Tube | Made-in-China.com
T9 circular fluorescent lamps - Svetila.com
Feit Electric 22-Watt 8 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Warm White 3000K (6-pack) FC8T9/WW/6 - The Home Depot
32W T9 G10q Circline Fluorescent Bulb (2-Pack) by Satco Lighting at Lumens.com
4 Easy Ways to Change a Circular Fluorescent Light Bulb - wikiHow
4 Easy Ways to Change a Circular Fluorescent Light Bulb - wikiHow
Feit 30 W T9 9 in. D X 9 in. L Circline Fluorescent Bulb Warm White Circular 3000 K 1 pk - Ace Hardware