Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Philips 32-Watt 12 in. Circline T9 Linear Fluorescent Tube Light Bulb, Cool White Plus (4100K) (12-Pack) 391177 - The Home Depot | Fluorescent tube light, Fluorescent tube, Tube light
Replace 32W Circular Fluorescent Tubes With 20W LED
22 Watt Fluorescent T9 Circline 8 In. Light Bulb with 4 Pin (G10Q) Base, 4200K - FC8T9/
AMATRON ETL Listed 16" T9 24W LED Circline Bulb LED Circular Tube 5000K Daylight Frosted Lens with Non-Dimmable External Power Driver to Replace 16 inch 40W Fluorescent Circline - Led Household Light