LH0860 G10q, T9 circline lamp holder/socket with snap in mounting
G10q Lampholder for Circular T9 Tubes
Feit Electric 30-Watt 9 in. T9 G10q Linear Circline Fluorescent Tube Light Bulb, Cool White 4100K (6-Pack) FC30/CW/6 - The Home Depot
Metal Clip Light Holder T4 T5 T6 T7 T8 T9 T10 T12 T13 Mounting Accessories for Fluorescent Tube Replacement Tubular Lamp Support - AliExpress
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)