Abstract: An improved built-in ceiling light. The dimensions of openings provided in false ceilings for the installation of built-in ceiling lights result in light housing dimensions which do not always provide the necessary storage space for the electrical components, in particular the ballast. It is known to obtain this necessary storage space by means of a projection from a side wall on the side of the housing base. However, this impedes the installation assembly. To avoid this difficulty the improved ceiling light has a projection which is a lid pivotally mounted to a housing base and to which the electrical components are attached. Then, during the insertion of the light housing, the lid, together with the electrical components, can be pivoted sufficiently far through a rectangular opening in a longitudinal side wall into the light housing.

Abstract: A long field lamp whose housing is provided for the optional insertion of different mirror arrangements in order to realize different radiation characteristics in accordance with desired demands. The long field lamp has different positions of the fluorescent tube dependent upon the mirror arrangement used. These different positions can be realized with mounts adjustable in vertical and horizontal directions. An adjustable mount has a holder composed of a frame for accepting the mount and has a foot plate attached and aligned perpendicularly thereto. For horizontal displacement, the foot plate is held in the region of an end wall of a lamp housing with clamp feet in displacement slots in a housing floor of the lamp housing. The vertical displacement of the mount is provided in that the mount is introduceable into the frame at differing distances from the foot plate.