Feit Electric 15-Watt 8 in. T9 G10q Type A Plug and Play Linear Circline LED Tube Light Bulb, Tunable White FC8/3CCT/LED - The Home Depot
22 Watt Fluorescent T9 Circline 8 In. Light Bulb with 4 Pin (G10Q) Base, 6500K - FC8T9/
10 x 32W T9 Circular Fluorescent Tubes Lamp Globe Cool White 4000K Quad Phosphor 9318416074296 | eBay
Caprock FC22T5/865 22W 22 Watt 7.25 inch Diameter Circular Fluorescent lamp/Bulb for Magnifying Lamps - Amazon.com
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey