Through the identification of different packet-types, packets can be handled based on an assigned packet handling identifier. The voltage regulator further includes an efficiency monitor configured to detect the voltage drop and control predetermined steps of a duty cycle of the switching regulator based on the voltage drop. This method step is followed by setting at least one of: a design reference point of the zone, the extent of the zone, the optical effect within the zone based on the provided contour, and the visual points. The assembly is further configured to reflect and focus rotationally symmetrically about the axis of symmetry the scattered light to the detector. This is achieved by, for example, providing a current discharging transistor of a gate driver 8 with a small channel width to decrease the maximum current value.