TCP 13 Watt 8.75 Inch T9 Circline LED Bulb, 2700K, Enclosed Fixture Rated | LED 13W T9 CIRCL W CONN 27K | Bulbs.com
Feit Electric FC8/840/LED Led Bulb, Linear, T9 Lamp, 22 W Equivalent, G10q Lamp Base, Frosted, Cool White Light: LED Linear U Shaped & Circuline Bulbs (017801907186-1)
Philips 22-Watt 8 in. Linear T9 Fluorescent Tube Light Bulb Cool White (4100K) Circline 391169 - The Home Depot