Feit Electric 22-Watt 8 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Warm White 3000K (12-pack) FC8T9/WW/12 - The Home Depot
FC22T5/865 Outside PINS 22W 22 Watt 7.25 inch Diameter Circular Fluorescent lamp/Bulb for Magnifying Lamps - Amazon.com
BULBMASTER FC8T9/CW 22 Watt 8 Inch Round T9 Fluorescent Circular Light Bulb, Cool White 4100K, 1120 Lumens G10Q 4-Pin Base 22W Circline Ceiling Lights - Amazon.com
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey