E-Simpo® 6pcs 2G7 4-Pin H Lamp Fluorescent Light Holder 2G7 Base Horiztonal Single Head Tombstone Lamp Socket for LED Fluorescent Tube(2G7) - - Amazon.com
Lampholder G10.2q 4-Pins - Neutral - Proflamps
G10Q 4-Pin Tube Light Socket,Ceramics 4-Pin G10Q Base Socket for FC8T9/DL Circline Fluorescent Lamps (Pack of 2) - - Amazon.com
LH0885 10w, 13w G24q-1, GX24q-1 4 pin CFL lamp holder/socket with horizontal snap in mounting