Philips Spring Loaded Slim-Line Tombstone Single Pin T8/T12 Fluorescent Lampholder (2-Pack) - Gillman Home Center
Philips H04 lamp holder | eBay
Pack of 20, Double Hole Screw Fixing T8 Light LED Bulb Socket Lamp Holder For LED Fluorescent Tube Replacements, AC100 to 250V 50/60Hz,Black and White (20 Pack) - Amazon.com