Method for creating a busbar system for lamps, wherein the busbar system comprises a, preferably U-shaped, mounting rail and a current conducting profile which is disposed on or in the mounting rail and has wires for supplying power and/or transmitting control commands for the lamps, wherein the current conducting profile is formed by joining together a plurality of wire holding elements (25, 26) which comprise the grooves for receiving the wires, wherein the majority of the wire holding elements (25, 26) have a predefined standard length and the remaining further wire holding elements (25, 26) have a length which deviates from the standard length, wherein said remaining wire holding elements (25, 26) having the length which deviates from the standard length are disposed in the central region between the further wire holding elements (25, 26) of the current conducting profile, and wherein all of the wire holding elements (25, 26) are configured in their end regions such that, when they are joined together, they engage with one another in an overlapping manner with projections at their ends in such a way that they form channels in the connecting region which correspond to the grooves and are open to the contacting side, characterized in that the wire holding elements (25, 26) having the length which deviates from the standard length are produced in an injection molding process, wherein • two tool inserts (30, 31), which in the assembled state form a cavity the shape of which corresponds substantially to the wire holding element to be produced, can be positioned offset relative to one another in different ways, wherein the offset of the two tool inserts (30, 31) disposed offset relative to one another is accordingly selected to produce the wire holding element of the desired length, • or, using exjection technology, a lower mold insert and an upper mold insert form a cavity, which corresponds to the structure of the wire holding element to be produced and is filled with a liquefied plastic material via a nozzle, wherein the lower mold insert is shifted relative to the upper mold insert during the filling process and the entire resulting cavity is gradually filled with the plastic material to achieve a desired length of the wire holding element corresponding to the length of the movement of the lower mold insert. • two tool inserts (30, 31), which in the assembled state form a cavity the shape of which corresponds substantially to the wire holding element to be produced, can be positioned offset relative to one another in different ways, wherein the offset of the two tool inserts (30, 31) disposed offset relative to one another is accordingly selected to produce the wire holding element of the desired length, • or, using exjection technology, a lower mold insert and an upper mold insert form a cavity, which corresponds to the structure of the wire holding element to be produced and is filled with a liquefied plastic material via a nozzle, wherein the lower mold insert is shifted relative to the upper mold insert during the filling process and the entire resulting cavity is gradually filled with the plastic material to achieve a desired length of the wire holding element corresponding to the length of the movement of the lower mold insert.