MegaWatts. Circular CFL Mini Light Bulb 22 W Voltech
Philips 22-Watt 8 in. Linear T9 Circline Fluorescent Tube Light Bulb Bright White (3000K) 392225 - The Home Depot
Adjustable Color Temperature T9 Led Circular Light Bulb,6w 10w Led Circline Light Bulb Replacement For Fluorescent Circular Bulb - Buy Color Changeable Led Circular Tube,T9 Led Round Tube,Adjustable Color Temperature Led Circular
TCP 13 Watt 8.75 Inch T9 Circline LED Bulb, 4100K, Enclosed Fixture Rated | LED 13W T9 CIRCL W CONN 41K | Bulbs.com
Feit Electric 30-Watt 9 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Cool White 4100K (1-Bulb) FC30/CW - The Home Depot
Feit Electric Color select 32-Watt EQ 12-in Cool White G24q-2 Pin Base Circline Type A LED Tube Light Bulb in the LED Tube Light Bulbs department at Lowes.com
Lighting Supply Blog: A Little Light Reading - LIGHTING SUPPLY