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if you are driving with your high beam lights on you must dim them at least 500 ft from any oncoming vehicle so you don t blind the oncoming driver you must use low beam lights if you are within 200 300 ft of the vehicle you are following consult your state s drivers handbook for details if an approaching car is using its high beams don t look directly into the oncoming headlights look toward the right edge of your lane
Many users are confused about when to use of low beam and high beam headlights. Think about this: low beams let you see about 200 feet ahead. It can take about 200 feet to stop when you drive at 30 mph. That is almost half a city block in length. If you cannot see 200 feet ahead, you may not be driving safely at 30 mph.