How far should headlights illuminate?

Headlights should typically illuminate the road ahead for a distance of at least 150 to 200 feet for low beams and up to 350 to 500 feet for high beams. This range allows drivers to see obstacles, road signs, and other vehicles in time to react safely. Proper alignment and brightness are essential for effective visibility without blinding oncoming traffic. Additionally, local regulations may specify specific requirements for headlight performance.