Philips 32-Watt 12 in. T9 Circline Linear Fluorescent Tube Light Bulb, Daylight Deluxe (6500K) (1-Pack) 262600 - The Home Depot
Circular Fluorescent Light Bulb 10 W - LAMP12/10
Philips 22W T9 4 Pin Circline Soft White Fluorescent Light Bulb | Home Hardware
22 Watt Circle Fluorescent Bulb | 250942 - GLOBALindustrial.ca
GE Cool White 40 W Fluorescent 16-in Circline 4-Pin Light Bulb (1-Pack) | Lowe's Canada
How to Change out Fluorescent Light Bulbs in a Circline Fluorescent Light Fixture - YouTube
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
FC12T9 32W Watt Circular Fluorescent Lamp 12" Inch Light Bulb Cool White | eBay