SCREW TYPE PHOTOCELL - Modern Electrical Supplies Ltd
TWDRTDD Indoor/Outdoor Light Control Socket With Photocell,Automatic Dusk to Dawn Light Activated Socket Adapter for E26 E27 Base Lamps and Fixtures (Gray,JL-303A) - Amazon.com
eSenLite LED CFL Bulb Lamp Sockets of Motion Activated Radar Sensor Dusk to Dawn Dimmable for Most Light Fixtures (1-Pack) EE101WLS-1 - The Home Depot
Woods 150-Watt Light Control with Photocell 59405WD - The Home Depot