Fog lightsBelgium
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160. Fog lights
Fog lights are vehicle lights designed for use in conditions where visibility is seriously reduced by fog, snow or other severe weather. Front fog lights illuminate the road ahead at a low level, while rear fog lights make the vehicle more visible to road users approaching from behind.
Fog lights should only be used in the conditions permitted by local traffic rules. Rear fog lights are particularly bright and can dazzle or distract following drivers when visibility is good.
Wikimedia.org • Ehsnils • CC BY-SA
When may front fog lights be used in Belgium?
Front fog lights may only be used during fog, snowfall or heavy rain. They may replace dipped beam or main beam or may be used together with those lights.
When must rear fog lights be used in Belgium?
Rear fog lights must be used when fog or snowfall reduces visibility to less than 100 metres and also during heavy rain.
May you use rear fog lights in normal weather in Belgium?
No. Rear fog lights may not be used outside the circumstances permitted by the Road Code because their strong light can unnecessarily affect drivers travelling behind.

Traffic rules
Belgium