Feit 32 W T9 12 in. D Circline Fluorescent Bulb Cool White Circular 4100 K 1 pk - Ace Hardware
New Feit Electric FC30/CW Circular Fluorescent Bulb 30 W 4-Pin G10Q Lamp Base 1550 Lumens 4100K Color Temp (Case of 6) - Walmart.com
Westinghouse 0601000 22 Watt T9 Circular Fluorescent Light Bulb 4100K Cool White 4-Pin Base
Philips 32-Watt 12 in. Linear T9 Circline Fluorescent Tube Light Bulb Bright White (3000K) (1-Pack) 391227 - The Home Depot
Curved LED Filament T10 Tubular Vintage Light Bulb
Large (12-16″) Circular Fluorescent Tube | The M.e.t.
Feit Electric 40-Watt 16 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Cool White 4100K (1-Bulb) FC16T10/CW - The Home Depot
Vintage LED Bulbs | Curved Filament ST21 Edison Bulb
Project 'Green' House #1: LED replacement lighting for circular fluorescent tubes // DavidJB.com // Python, Technology, Web, Linux, and more, by David Beitey
RS PRO | RS PRO 12 W Circular Fluorescent Tubes, 135mm, G10Q | 137-468 | RS Components
Replace 32W T9 Circular Fluorescent Tubes With 20W LED
22W 32W 40W Circular LED Tube T5 T8 round tube light circle Ring lamp LOT | eBay