In a lighting strip system having an elongate support arrangement for holding lamp units and lines for electricity supply and/or signal transmission, the support arrangement has an I-shaped profile in cross section, with two receiving regions, which run in the longitudinal direction of the support arrangement and are separated by a preferably vertically aligned partition, wherein the lines for electricity supply and/or signal transmission are arranged in one of the receiving regions and operational devices of the lamp units are arranged in the other receiving region.