Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Kosnic 22w T5 Circular 2Gx13 4 Pin Cool White (4000k) Fluorescent Tube, GR10q, 22 W : Amazon.co.uk: Lighting
Lamp 32w Round Circular Fluorescent Tube Warm White