Can fog lights only be turned on in foggy weather?

[Nunes]

There is no clear regulation stating that fog lights can only be used in foggy weather. They can also be turned on when visibility is poor or during heavy rainfall, depending on the situation. Function of fog lights: Fog lights are designed to make your vehicle visible to others in foggy or rainy conditions, so they require high brightness and strong penetration. Ordinary LED daytime running lights or headlights cannot meet these requirements. Precautions for driving in fog: When visibility is less than 1 kilometer in foggy weather, you must turn on your headlights and rear fog lights. Turning on the headlights is not only for seeing the vehicle ahead but also to alert the vehicle in front. Otherwise, the leading vehicle may have difficulty noticing a following car when changing lanes in heavy fog, increasing the risk of a rear-end collision. Do not use high beams at night in foggy conditions. High beams are designed for wide-area illumination and can cause scattering in fog, creating a bright, white glare that reduces the driver's visibility of the road ahead.