When driving in dense fog or snow, what type of headlights should you use?

Using low beam headlights in dense fog or snow is recommended because they provide better visibility without causing excessive glare. High beam headlights can reflect off the moisture in the air, such as fog or snowflakes, creating a bright wall of light that reduces your ability to see. This can impair your vision and make it more difficult to navigate through these conditions.

Low beam headlights, on the other hand, are designed to illuminate the road directly in front of you while minimizing glare. They are aimed lower and have a more focused beam pattern, allowing you to see the road and objects ahead without scattering light in all directions. This is essential for maintaining good visibility in adverse weather conditions.

Fog lights can also be a helpful addition when driving in fog or heavy snow, as they are specifically designed to cast light in a wide, low pattern to illuminate the road just in front of the vehicle. However, they are typically used in conjunction with low beam headlights rather than as a primary light source. Daytime running lights do not provide enough illumination for nighttime driving or in adverse weather, and thus are not suitable for these conditions.