A system for mounting a light to a vehicle and methods for making and using same is disclosed herein. The system allows for a mounting assembly to be coupled to a front, a rear, or both the front and the rear of the roof of a vehicle. Lights can be mounting via light mounting brackets at various angles using a plurality of detents. The mounting assembly includes hollowed mounting fasteners for routing a light cable through the mounting fastener thereby requiring fewer holes through the roof of the vehicle to prevent water intrusion into the vehicle. The mounting fastener can be covered by a boot for preventing water intrusion into the vehicle. The mounting assembly advantageously can include a diffuser for reducing noise and vibration levels resulting from the coupling between the mounting assembly and the vehicle.