Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Sylvania 32-Watt Equivalent 12 in. Circline T9 Round Tube LED Light Bulb 41208 - The Home Depot
Philips 40-Watt 12 in. T5 Circline Linear Fluorescent Tube Light Bulb Neutral (3500K) 148593 - The Home Depot