Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Philips 40w Master TL5 Circular Warm White 3000k 2GX13 Fluorescent Lig – BulbAmerica
G10q T9 Circular Led Tube Light | 12w G10q Circular Led Light | Led Bulb White Tube - Led Bulbs & Tubes - Aliexpress
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
Satco, Circular Fluorescent Light Bulbs | Lamps Plus
Feit Electric 30-Watt 9 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Cool White 4100K (1-Bulb) FC30/CW - The Home Depot
Philips 32-Watt 12 in. Linear T9 Fluorescent Tube Light Bulb Cool White (4100K) Circline (1-Pack) 391177 - The Home Depot