Final answer:
You should typically switch to low beam headlights when you are within 150 meters of an oncoming vehicle at night to ensure road safety.
Step-by-step explanation:
The distance at which you should switch to low beam headlights when approaching an oncoming vehicle at night is not directly provided in the reference content. However, safe driving practices and road safety guidelines typically recommend switching to low beam headlights within a distance of 150 meters (500 feet) from an oncoming vehicle to avoid blinding the other driver. Different regions may have specific laws or recommendations, so it's advisable to consult the local transportation regulations for accurate guidelines.