Celiwace T9 LED Circline Light Bulb, FC8T9/DL Led Replacement for GE Philips Sylvania 8 Inch Circular Fluorescent T9 22W, Day Light 1500LM 2 Count - Amazon.com
GE Kitchen and Bath 22.5-Watt EQ T9 Warm White 4-pin Circline Fluorescent Light Bulb in the Tube Light Bulbs department at Lowes.com
Feit Electric FC8/840/LED 8 in. (22W Replacement) Cool White T9 Direct Replacement Circular LED Light | BuyRite Electric
Feit Legacy Bulbs 22 W T9 8.3 in. D X 8.3 in. L Circline Fluorescent Bulb Cool White Circular 4100 K - Ace Hardware
EIKO FC8T9/D 22W 4-pin Circline Fluorescent Lamp | Day Light