Assembly and lighting device comprising the assembly

A method for manufacturing an assembly comprising at least one electrical device and at least one carrier substrate arranged to support the at least one electrical device, the at least one carrier substrate comprising a metal core printed circuit board, and the method comprising:

• arranging the at least one carrier substrate with at least one tubular structure which is at least in part hollow, the tubular structure extending between a first end and a second end and having an opening at each of the ends to thereby permit passage of fluid through the at least one carrier substrate between a first side of the at least one carrier substrate and a second side of the at least one carrier substrate, wherein the at least one tubular structure is arranged such that it has an extension so that it protrudes a predefined distance from at least one of the first side and the second side,
• wherein the arranging of the at least one carrier substrate with the at least one tubular structure comprises deep-drawing, stamping out, or punching through at least a portion of the at least one carrier substrate, whereby the at least one tubular structure is constituted by an integrally arranged portion of the at least one carrier substrate.