Yes, headlights must be on low beam within 500 feet of an approaching vehicle.
500'
Be considerate in using your high beams. Your headlights must be on low beam when you are within 500 feet (150 m) of an approaching vehicle, or within 200 feet (60 m) of a vehicle ahead of you, even if the vehicle ahead is in a different lane. You should also dim your lights for pedestrians approaching you. http://www.nydmv.state.ny.us/dmanual/chapter10-manual.htm (Alaska and Oregon are the same as New York - 500 feet.)
300 feet
When approaching another vehicle from the rear at night, you must dim your high beam headlights within 200 to 300 feet of the vehicle. This helps prevent blinding the driver of the vehicle ahead and maintains safe driving conditions for everyone on the road. Always be mindful of your surroundings and adjust your headlights accordingly.
300 feet
Those laws vary from place to place. Common courtesy dictates to dim your lights well before they reach the oncoming vehicle.
You should only use your high-beam headlights when there is no oncoming traffic for at least 500 feet. This helps prevent blinding other drivers and ensures safe visibility for both you and others on the road. Always switch back to low beams when approaching another vehicle to maintain safety.
at least 2m
High beam headlights must illuminate objects at least 500 feet ahead of your vehicle. This ensures that drivers can see far enough ahead to react to any obstacles or hazards on the road. However, it’s important to switch to low beams when approaching another vehicle to avoid blinding other drivers.
You should switch from high beam to low beam when an oncoming vehicle is within 500 feet or when you are following another vehicle closely, typically within 300 feet. This helps avoid blinding other drivers and ensures safer driving conditions. Always adjust your headlights based on visibility and road conditions as well.
In most states it is 500 Feet. Common sense should prevail.