Lamp which is closed on two sides

A lamp which is closed on two sides and has an elongate bulb, which is closed off in a vacuum-tight manner, defines a longitudinal axis and is closed at opposite ends by sealing parts, with in each case one cap being fitted at one end, the cap having an electrical contact element which is connected in an electrically conductive manner to a supply conductor leading to a luminous means, the contact element being accommodated in a tubular extension of the sealing part, wherein an adjustment part comprises:

• a base part connected to a first outwardly protruding centering part and a second outwardly protruding centering part, wherein:
• the first outwardly protruding centering part provides a spring action and at least a first portion of the first outwardly protruding centering part contacts the supply conductor and at least a second portion of the first outwardly protruding centering part contacts an inner surface of the tubular extension;
• and
• the second outwardly protruding centering part comprises a first centering element, wherein the first centering element is angled off from the base part and at least a portion of the first centering element contacts the supply conductor.