This is a lamp from Paulmann which is fitted with a GU5.3 MR16 socket. This model is intended for indoor use and can change the lighting of a whole room.
From Amazon
Paulmann 98971 Quality Recessed Light swiveling max 50W 12V GU5,3 110mm White Sheet Steel
Conrad Electronic
Paulmann 98971 Quality Line Recess-mount bracket HV halogen GU5.3 50 W White