Device carrier made of galvanized, profiled sheet steel, surface coated with polyester resin. Tool-free fastening with integrated side lever locks for quick insertion into the support rail. LED unit in housing length for an optically continuous light band. Can be positioned variably in the support rail. Direct/indirect light distribution, opal diffuser made of PMMA plastic with internal longitudinal prisms, creates a uniform, homogeneous appearance with ceiling illumination. Continuous light band optics. Heat-resistant cables including 1m connecting cable and quick-assembly plug part with tool-free phase preselection and search finger.