What is the main purpose of using low beams when driving at night?

Using low beams when driving at night primarily serves to avoid blinding oncoming drivers. High beams can create significant glare for other drivers, making it difficult for them to see and increasing the risk of accidents. Low beams are specifically designed to provide adequate illumination of the road ahead while minimizing the amount of light that reflects back from road signs or the surface of the road, thus reducing glare that can impair the vision of other motorists. This practice contributes to safer driving conditions for everyone on the road, ensuring that visibility is balanced between adequate light for the driver and minimizing disruption to other road users.

The other options do not accurately capture the main purpose of low beams. Saving battery power is not a consideration when choosing between high and low beams, while improving visibility as much as possible often relates to using high beams in situations where there are no oncoming vehicles. Enhancing the vehicle's appearance has no relevance to the functionality of headlights during nighttime driving.