Ezfit 2G11 Lampholder 4 Pin LED CFL 2G11 Bulbs Socket Lamp Base for UVD Lamp - CFL Light Holder - - Amazon.com
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LH0517 Edwin Gaynor 285-Q6 75w GX24q-6 4 pin CFL lamp holder with vertical four hole mounting
Satco 90-1550 Fluorescent Lamp Holder G24Q-2 or GX24Q-2 for 18W 4 Pin CFL Lamps 45923915505 | eBay
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