Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
BELL 60 watt Colour 830 Warm White T9 Circular Tubes
Crompton Lamps Fluorescent T9 Circular 60W 4-Pin Warm White FC60W/830 | DIY at B&Q