Device carrier made of galvanized, profiled sheet steel, surface coated with polyester resin. Tool-free fastening with two integrated twist locks. LED unit made of extruded aluminum profile, naturally anodized with plastic end faces. Can be positioned variably in the support rail. Direct, unshielded light distribution, LED diffuser cover made of polycarbonate, with emergency light battery 3h and integrated status display, three-hour emergency light operation. Heat-resistant cables including 1m connecting cable and 4-pin quick-assembly plug part with tool-free phase preselection and search finger, an additional pole on the plug part allows a conductor of the through-wiring to be used as an unswitched charging phase.