AM CONSERVATION 18-Watt Equivalent CFLNI Horizontal GX23-2 PL LED Light Bulb 5000K in Daylight (4-Pack) L9PL50GX23-2H-4 - The Home Depot
GE 19-Watt EQ Warm White G24q-2 Pin Base LED Light Bulb in the General Purpose LED Light Bulbs department at Lowes.com
GE 18W 4 Pin G24q2 Neutral White Double Twin Tube CFL Bulb | F18DBX/835/4PL (4-Pin) | Bulbs.com
Feit Electric 13W/18W/26W Equivalent PL Horizontal 4-Pin Universal Base G24Q/GX24Q-1/-2/-3 with CCT Select LED Light Bulb (4-Pack) PL26AHCCT/LED/HDRP/4 - The Home Depot
TCP LPL218B2541K 8W PL LED Lamp 4100K Type B Direct Wire 120-277V