Warn Driving lights have a 55 watt H-3 quartz halogen bulbs are designed with low amp-draw so they can be on all the time. Second, since driving lights are designed to supplement original equipment headlights, the 2-axis mounting bolts allow for precise aiming of the light beam. In short, you can eliminate any dark voids left by your original headlights. Additionally, the lens is sealed to lock out dirt and moisture.