What type of headlights should be used in heavy rain?

In heavy rain, low beam headlights are the appropriate choice because they provide sufficient illumination without causing excessive glare for other drivers. High beam headlights can reflect off the rain droplets, creating a blinding glare that significantly reduces visibility for both the driver using them and for oncoming vehicles. Fog lights, while helpful in conditions like fog or snow, are not designed for heavy rain situations and may not provide the right spread of light needed to see the road clearly. Driving without headlights is unsafe and illegal in most conditions, as it greatly diminishes visibility and increases the risk of accidents. Therefore, using low beam headlights is the safest and most effective way to enhance visibility while driving in heavy rain.