Abstract: The invention relates to a device for connecting the plug-in base (5) of a side-mounting luminaire to a carrier tube (3), in particular to the tube (3) of a luminaire mast, it being possible for the plug-in base (5) of the side-mounting luminaire to be connected to the carrier tube (3) and to be fixed to the carrier tube (3) by means of a securing element (15) which can be inserted into the side-mounting luminaire from the outside inward, and it being possible for the securing element (15) to be pressed against an abutment which effects clamping. The securing element (15) cooperates with a clamping device (10) which, when the securing element (15) is inserted into the tube interior (12), converts the clamping force directed away from said element into the tube interior (12) into a clamping force directed outward from the tube interior (12), the clamping device (10) pressing a clamping member (11b) against the inner wall (17) of the carrier tube (3), which wall acts as the abutment (16).

Abstract: The invention relates to a device for connecting the plug-in base (5) of a side-mounting luminaire to a carrier tube (3), in particular to the tube (3) of a luminaire mast, it being possible for the plug-in base (5) of the side-mounting luminaire to be connected to the carrier tube (3) and to be fixed to the carrier tube (3) by means of a securing element (15) which can be inserted into the side-mounting luminaire from the outside inward, and it being possible for the securing element (15) to be pressed against an abutment which effects clamping. The securing element (15) cooperates with a clamping device (10) which, when the securing element (15) is inserted into the tube interior (12), converts the clamping force directed away from said element into the tube interior (12) into a clamping force directed outward from the tube interior (12), the clamping device (10) pressing a clamping member (11b) against the inner wall (17) of the carrier tube (3), which wall acts as the abutment (16).