Simply Conserve G24Q/GX24Q Vertical PL 18-Watt EQ Single tube Daylight Gx24q-4 Pin Base LED Light Bulb (4-Pack) in the General Purpose Light Bulbs department at Lowes.com
Philips 18W 4 Pin 2G11 Cool White Long Single Twin Tube CFL Bulb | PL-L 18W/41 (4-Pin) | Bulbs.com
Feit Electric 26-Watt Equivalent PL Tritube CFLNI 4-Pin Plug-In GX24Q-3 Base CFL Replacement LED Light Bulb, Cool White 4100K (1-Bulb) BPPLT26E841LEDG2HDRP - The Home Depot
Philips 32W 4 Pin GX24q3 Neutral White Long Triple Twin Tube CFL Bulb | PL-T 32W/35/4P/ALTO (4-Pin) | Bulbs.com
9.5 Watt 120-277V G24q/GX24q 4 Pin Direct Replacement LED PL Lamp – Green Electrical Supply
Feit Electric 13-Watt Equivalent PL CFLNI Quad Tube 4-Pin G24Q-1 Base Compact Fluorescent CFL Light Bulb, Cool White 4100K (1-Bulb) BPPLD13E/41/HDRP - The Home Depot