60 watt T9 Circular Fluorescent Tube Colour 835 Standard White
Circular Fluorescent Light Bulb 10 W - LAMP12/10
22 watt Cool White T9 Circular Fluorescent Tube
Bell 60W T5 Circular Fluorescent Tube - 2GX13, 3000k - (05470) | Light Shop Direct
Crompton 60w Circular Fluorescent Tube T9 840
Crompton - 32W Circular Fluorescent | Fluorescent Tubes at Snape & Sons
40W Circular Triphosphor Tube – Retro Bulbs
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey