Which lights should you use in fog

In fog or other low visibility conditions, you should turn on your main headlights. Fog lights should be activated in addition to your dipped headlights when visibility falls to less than m. Rear fog lights can obscure your brake lights and may prevent drivers behind from realising that your braking. Both front and rear fog lights create unnecessary glare in good visibility which can dazzle and annoy other road users. Now that fog lights have been cleared up, why not read our article on dipped headlights and when to use them?

Brand loyalty evaporates as car demand hits all-time high. Skip to Content Skip to Footer. When to use fog lights Some drivers seem to think that the slightest bit of mist is reason enough to turn on fog lights, but that is certainly not a reason to turn them on. The Highway Code Rule states: "You MUST use headlights when visibility is seriously reduced, generally when you cannot see for more than metres feet. The Highway Code gives explicit instruction on when you shouldn't use fog lights, in Rule "You MUST NOT use front or rear fog lights unless visibility is seriously reduced see Rule as they dazzle other road users and can obscure your brake lights.

Fog light use Q and A Do fog lights really work? Do all cars have fog lights? What is the purpose of fog lights on a car? Which lights do you use in fog?

Why should you turn your fog lights off when visibility improves? Then, the thick, hazy fog rolls in, obscuring the road in front of you. Anything beyond a couple hundred feet is a cloudy white. So like all drivers in fog, you reach for the headlight switch. High beam headlights give off a bright glow that goes as far as feet in front of your car.

High beams are aimed directly in front of you and are great for driving at night in rural areas or on poorly lit roads. While high beams were designed to maximize your seeing distance, low beams only go as far as feet. That means high beams reach twice as far as your low beams. Oregon has freezing fog that can coat the road like black ice. Tule fog can reduce visibility on a stretch of highway to only a few feet, while other areas are nearly clear.

This is true of fog anywhere: You can be driving along with enough visibility and then suddenly go through a patch where you can barely see the road. Fog lights are designed to be used at low speed in fog, heavy mist, snow and other poor-visibility situations. Front fog lights will help you see white lines and kerbs better in foggy conditions but make sure you use them with dipped headlights — not full beam lights that reflect the light back making it harder to see.

If you do, you could dazzle other drivers. Switch on your rear fog lamps when there is no one close behind — but switch them off as soon as they have done their job and the driver behind can see your regular tail lamps.