In foggy conditions, using low beams or fog lights is essential because these lights reduce glare and improve visibility without reflecting off the fog or moisture in the air. High beams can scatter more in fog and cause even less visibility for you and other drivers. Maintaining low beams ensures that the road is slightly more visible and you are visible to others, thereby enhancing the safety of all vehicles in the fog. This practice helps prevent accidents by ensuring you are not blinded by your own headlights and can see the road ahead more clearly.