CHKADAWA FC8T9/CW Circular Fluorescent Light Bulb, 8 Inch Circline T9 22W Round Bulbs Replacement for Ceiling Fixture, Ring Cool White lamp 4100K 1350 Lumens, G10q 4 Pin Base, 2 Pack - Amazon.com
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
Velleman CIRCULAR FLUORESCENT TUBE 12W/T4 FOR VTLAMP10 | Leroy Merlin