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 optically continuous light strip. Light distribution direct/indirect, deep-wide beam, the slightly static diffuser made of PMMA plastic, with internal longitudinal prismatics, creates a uniform, homogeneous appearance with ceiling illumination. Continuous light strip optics. Electrical connection using a fixed 3-pin quick-assembly plug with free phase preselection. Integrated guide aid for quick contact.