An electric stepper motor having increased motor torque includes a thru-hole, a rotor and a stator. The inventive concept is based on manufacturing a lighting device on an at least partly flexible sheet assembly which is rolled into a tube, such that the light source of the lighting device is arranged within the tube. A communication system is provided for two-way wireless communication with the vehicle units. The computerized device receives instructions to configure a table of the GSP with scheduling entries.