The SDB-160HB uses a free curve reflector. A Free Curve reflector is very efficient because it uses the whole reflector. This allows the spot beam to illuminate approximately 235 meters ahead and the driving beam to illuminate the entire surface in front of the vehicle. The SDB-160HB has an internal light frame to protect the lamp from vibration and shock when running off-road, plus an impact resistant polycarbonate body protects the exterior. Heat and weather resistant EPT material helps protects lamp integrity