4 Easy Ways to Change a Circular Fluorescent Light Bulb - wikiHow
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Circular Round Fluorescent Lamp Tube T5 T6 T9 Waterproof Energy Saving 22W 28W 32W 40W 55W 4 Pins Base CE RoHS , FLT-CIRCLE| Alibaba.com
10V-110V-120V/220V-240V 22W Circular Fluorescent Lamp - China Magnifier with LED Light, Magnifier Lamp | Made-in-China.com
Circular fluorescent lamp / Narva / 32 W / 3 zone / T9
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey