From Nowadays, most projector headlights are electrically operated, emitting high beam lights straight ahead to maximize the good visibility. Low beams, on the other hand, can control lights which go upward and reroute most of its illumination downward to either rightward or leftward. Low beams goal is to deliver safe and excellent driving visibility without too much glare or back dazzle. High beam headlights, however, send too much glare and cause back dazzle brought by the reflection from rain, snow and fog.