This is a lamp from Endon Lighting which has an E27 socket. This pendant lamp should be used indoors and can change the lighting of a whole room.
From Debenhams
Hurst Pendant Bright Nickel Plate & Clear Glass 3 Light Dimmable IP20 E27 - Grey - One Size
Massive Lighting
Endon Hurst 3lt Pendant 76227 By Massive Lighting