the opposite of the headlight?, The opposite of a front light is a tail light. A headlight is a light on the front of a vehicle (such as a car or bicycle) that is intended to illuminate the road for the driver when driving in the dark or when visibility is poor. However, the tail light is the light at the rear of the vehicle and it alerts other road users to the presence and movement of the vehicle, especially when braking or turning. Together, these lighting systems improve visibility and safety on the road for both the driver and other road users.