LH0631 Edwin Gaynor 389-13-SC 13w 2GX7 4 pin CFL horizontal lamp holder with two hole mounting
LH0386 Vossloh 108557 CFL 4-pin 18w lampholder
Ezfit 2G11 Lampholder 4 Pin LED CFL 2G11 Bulbs Socket Lamp Base for UVD Lamp - CFL Light Holder - Amazon.com
Feit Electric 18-Watt Equivalent PL CFLNI Quad Tube 4-Pin G24Q-2 Base Compact Fluorescent CFL Light Bulb, Soft White 2700K (1-Bulb) BPPLD18E/HDRP - The Home Depot
Leviton Lampholder For G24Q And Gx24Q Lamp Bases 4-Pin 26725-403 - The Home Depot