Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
LED Circle Tube Light - Westinghouse Lighting Latin America
Feit Electric 40-Watt 16 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Cool White 4100K (1-Bulb) FC16T10/CW - The Home Depot
GEL33774 Circular GE Fluorescent Light Bulbs | OnTimeSupplies.com
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