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
LED PL/CFL Plug 'N Play Replacement for 4-pin bulbs in electronic ballast fixtures - All G24Q bases
Philips 26-Watt G24Q-3 PL-C 4-Pin CFL (non-integrated) Light Bulb Soft White (2700K) (1-Pack) 230425 - The Home Depot
Feit Electric 26-Watt Equivalent PL Quad Tube CFLNI 4-Pin Plugin G24Q-3 Base CFL Replacement LED Light Bulb, Cool White 4100K (6-Pack) BPPLD26E841LEDG2HDR6 - The Home Depot