Compressed Variety grain bayonet light bulb holder Made to remember empty To deal with
File:Bayonet lightbulb and socket.jpg - Wikimedia Commons
Bayonet B22 Standard Switch Light Lamp Holder, B22 BC Socket Lamp Holder Base with Cord Grip, Bayonet Cap Fitting for Pendant Lamp, Ceiling Lamp (2-Pack, White). : Amazon.co.uk: Lighting