Abstract: A lighting system arrangement has a fluorescent tube having a base which can be locked into a socket at its end for electrical contact and a housing having a top rear section with the top rear section of the housing having a bracket-shaped section including a flat upper section adapted to allow attachment of the socket in a precise geometric position and having an elongated vertical section with the vertical section forming a hollow inner space inside for allowing a wire to be fed through and an opening for the inner hollow space for allowing to make electrical contact to a wire, and a cylindrical housing section immediately joining the elongated vertical section of the lighting housing, and an outward flange adjoining the cylindrical section and providing an abutment for a fluorescent light tube, wherein the hollow inner space passes from the modular lighting housing to the socket and ends such as to be suitable to provide contact to one respective pin of the fluorescent tube in a contact area.