Railroad tracks, tunnels, or intersections.
500'
Yes, headlights must be on low beam within 500 feet of an approaching vehicle.
according to Florida handsbook, you must dim your bright headlights within 300 feet of the vehicle ahead.
Lower headlight beams must be used when approaching within 500 feet of an oncoming vehicle or when following within 300 feet of the rear of another vehicle. This helps to prevent glare and ensures that visibility is maintained for both drivers. Using the appropriate headlight settings enhances safety on the road.
You must dim your high-beams if you're within 500 feet of an approaching car and dim your high-beams within 300 feet of the vehicle you follow.
300 feet
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.)
at least 2m
100 feet
500 to 1000 ft.
100 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.