Ceramic GU10 fitting with bayonet connection for 230V LED lamps - R&M Lighting
Antique Brass Pendant Lamp holder Edison E27 fitting
Leviton 2-Outlet White Socket with Pull Chain R52-01406-00W - The Home Depot
Leviton 3-Way Socket Lamp Holder R50-07090-0PG - The Home Depot
Power Gear 3-Way Lamp Socket, Medium Base, Turn for Low-Medium-High Light Settings, For Floor and Table Lamps, DIY Project, UL Listed, Brushed Gold, 54372 - Light Sockets - Amazon.com