GEL33774 Circular GE Fluorescent Light Bulbs | OnTimeSupplies.com
Lighting Supply Blog: A Little Light Reading - LIGHTING SUPPLY
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey