Unshielded light building elements with light emission on one side or on two sides. Different architectural dimensions require different luminaire proportions. These light building elements, with mounting heights of 2500 millimetres and 3500 millimetres, are a great solution for lighting applications in small to medium-sized public areas. Small squares, entrance areas in front of buildings and connecting paths are typical examples of applications for BEGA light building elements with these dimensions. They are illuminating and structure-giving design elements.