When driving in fog, it is important to use the appropriate lights to ensure visibility and safety. Here are some tips on what lights to use in fog based on the search results:

• Use low-beam headlights: High beams can reflect off the fog and make it harder to see. Low beams are directed downward and can help you see the road better without reflecting back into your eyes.

• Use fog lights if you have them: Fog lights are designed to be used in low-visibility conditions and can help you see the road better in fog. They are mounted low on the vehicle and aim light into the layer of fog-free air above the road surface.

• Do not use high-beam headlights: High beams can cause glare and make it harder to see in fog.

• Do not use only your parking or fog lights: This is illegal and unsafe. Use rear fog lights if you have them when visibility is less than around 300 feet.

• Use your headlights in conjunction with fog lights: Fog lights are not designed to take the place of your regular driving lights, so use them in conjunction with your headlights in low-visibility settings.

Remember to drive with enough stopping space so you can stop in the distance you can see, and minimize distractions like music and cell phone use so you can listen for traffic you might not be able to see.