a bellows assembly for an articulated vehicle connects a first vehicle module and a second vehicle module . the bellows assembly forms a tube between the first vehicle module and the second vehicle module with a top region and a bottom region , the top region corresponding to a roof region of the vehicle above an aisle of the vehicle . the bellows assembly includes a section configured to receive a lighting installation , the section being arranged in the top region of the bellows assembly . further , an articulated vehicle with such a bellows assembly and a system for installing such a bellows assembly is described .