fog-light

US /ˈfɑːɡ ˌlaɪt/
UK /ˈfɑːɡ ˌlaɪt/
1.

mistlamp

a bright light on a vehicle, used in fog or other conditions when it is difficult to see:

:
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He was dazzled by fog lights on an oncoming vehicle.
:
fogfog lampfog uplightlightinglightnessin the light of