Sylvania 22-Watt 8 in. Circline Tube T9 Fluorescent Light Bulb Cool White 23519 - The Home Depot
Replacement 8'' Ring Light (Ring Only)
Feit Electric Color select 22-Watt EQ Cool White G24D-2 Pin Base LED Light Bulb in the Tube Light Bulbs department at Lowes.com
11W Circular Tube 4 Pins T4 Round Tube Light Circle Ring Lamp Light Bulb | eBay
Yegren 8w 10w Fluorescent Ring Lamp Tube Inner Diameter 67.5 Mm 70 Mm 78 Mm Microscope Top Ring Light Source Inner Core - Microscope Parts & Accessories - AliExpress
Amazon.com: Yongjiadian G10Q Ring Light 4 Pin Base 10W LED Round Tube Replacement Fluorescent Tube (Size : Cool White) : Tools & Home Improvement
Replace Circular Fluorescent Light Bulb with LED 205mm 11W T9 Ring Light _ - AliExpress Mobile
30 Watt Fluorescent T9 Circline 8 In. Light Bulb with 4 Pin (G10Q) Base, 3000K - FC8T9/830/EL
11W T4 Round Annular Tubes Lamps Bulb Fluorescent Ring Lamp Tube With 4 Pins - Walmart.com