Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
40W Circular Fluorescent Tube T5 Cool White | 300mm Dia
Circular Fluorescent Light Bulb 10 W - LAMP12/10
T9 Circular Fluorescent Tube 22W - 216 mm in diameter - ElectroMaterial