Head lamp switch with twilight sentinel control

A system for controlling the turning on of vehicle headlamps 703 of a vehicle having a dome light 50 which provides a variable dome light intensity includes a sensor 40, a memory 820, a comparator 810, and a circuit 18. The sensor 40 senses the intensity of ambient light and provides a first signal alpha indicative of the intensity of the ambient light. The memory 820 stores a light value sigma corresponding to the intensity of the dome light 50. The comparator 810 receives the first signal alpha a and compares the intensity of the ambient light with the stored light value sigma. The comparator 810 provides an output second signal beta when the first signal is at or below the stored light value sigma. The circuit 18 turns on the vehicle headlamps 703 when the circuit 18 receives the output second signal beta.