Yes, headlights must be on low beam within 500 feet of an approaching vehicle.
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.)
according to Florida handsbook, you must dim your bright headlights within 300 feet of the vehicle ahead.
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.
at least 2m
500 to 1000 ft.
Those laws vary from place to place. Common courtesy dictates to dim your lights well before they reach the oncoming vehicle.
That you adjust your speed so you can react and stop within the distance lighted by your headlights.
1,000
You should dim your headlights when you are following another vehicle within a distance of 200 to 300 feet. This prevents blinding the driver in front of you with your high beams. Additionally, it's advisable to switch to low beams when you are within this distance, especially at night or in low visibility conditions. Always prioritize safety and visibility for all drivers on the road.
500'
You should dim your headlights when an oncoming vehicle is about 500 feet away. This helps avoid blinding the other driver and ensures safe visibility for both vehicles. Additionally, if you are approaching a vehicle from behind, you should dim your lights when you are within 300 feet.
The minimum distance to dim your headlights when following another vehicle is typically within 200 to 300 feet, depending on local traffic laws. This ensures that you do not blind the driver ahead with your high beams. It's important to adjust your headlights to low beam to maintain safety and visibility for all road users. Always check your local regulations for specific requirements.