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 strip. Can be positioned variably in the support rail. Light distribution direct/indirect beam, opal diffuser made of PMMA plastic with internal longitudinal prisms, creates a uniform, homogeneous appearance with ceiling illumination. Heat-resistant cables including 1m connecting cable for variable device carrier positioning in the light strip and 3-pin or, for dimmable, 5-pin quick-assembly plug part with free phase preselection.