Abstract: A composite element for use as an insulating and/or construction means, where at least one layer is configured in the form of a foam layer, and where the foam layer comprises a foam material comprising a natural, renewable raw material; methods of using composite elements for thermal and/or acoustic insulation, including of buildings and/or roofs, and in the installation of heating and/or utility systems, including in floors and/or walls of buildings; an in-situ foam as well as a particulate foam material in loose filling for use as an insulating means; and an installation panel.

Abstract: To insure that lamps which have a non-rotation symmetrical feature or strure with respect to aligned bases (e.g., a tipped-off exhaust or pumping stub) are placed in a predetermined preferred operating position when inserted into socket terminals (2a, 2b), the lamp bases are formed with stepped surface abnormalities (10a, 10b), for example, in the form of recesses or projections from a terminal engagement surface (8a, 8b) extending perpendicularly to the lamp axis (A--A); socket springs (2a, 2b) have matching surface abnormalities which interengage with the surface abnormality on the base, for example by being formed with ridges, or depressions. The lamp thus can be inserted in such bases only if the respective surface abnormalities on the lamp bases and in the socket terminals can engage.