Head lights are a type of lighting system used in automobiles. They are typically located on the front of the vehicle and are used to illuminate the road ahead. The term 'head lights' can also refer to the two round lamps that are part of the lighting system. IDEAS, HALOES, and HALOS are all related to head lights in some way. IDEAS refer to the concept of having head lights on a vehicle, while HALOES and HALOS refer to the circular shape of the lamps.