When do you use REAR FOG LIGHTS?

When visibility is bad enough to warrent it I guess

When it's foggy, not when it's heavy rain like some d!cks

And if the car behind can actually see you, turn them off, so they can see your brake lights !

10 hours ago, tomo2001 said:

When it's foggy, not when it's heavy rain like some d!cks

LOL, I am one of those 'dicks'! I gauge that in some torrential rain, if I have issues seeing the car in front, then, the guy behind will have the same issues seeing me!

I just like to leave mine switched on all the time, then it saves having to remember to turn it on in bad weather 🤣

I don't even see it in my mirrors 🤣

only ever used them once in 40 years of driving TBF i couldnt see past the end of my bonnet.

Rear fog lamps should be linked to a vehicle speed limiter of 20 MPH.

If it's foggy enough to need the rear fog lamps on, you shouldn't be able to see enough to go over 20 MPH

The trouble with that is that it would discourage people like Stephen from using them when they were really needed.

I don't think I have ever used mine in anger. Since the clean air acts came in I have never seen a pea-souper like we occasionally got when driving in the late 50s/early 60s. Since then I've lived out of town so would be less likely to get one anyway.

1 minute ago, agraham said:

...Since then I've lived out of town so would be less likely to get one anyway.

In Northern Ireland, we often get plenty of fog, except on the coast where the wind simply blows it all away...

Plenty of fog here in suburbia.  Even the last few nights it's been too foggy to see across the other side of the road!  Rarely had fog where I lived before right on the coast.

theres a low spot at a place called Belmont. the road is quite often closed by the police due to heavy fog. mainly moorland with large water bodies and winding roads.

According to The Highway Code, Foglights should be used when visibility is below 100 metres.

52 minutes ago, SteveP1041 said:

According to The Highway Code, Foglights should be used when visibility is below 100 metres.

I'll make sure to check that next time it's foggy. I have a 10M tape in the car, so it will just take a little time while I measure it 🤣

in 43 years of motoring only once has it been foggy enough to use the fog light - except it wasn't as NOT a single other motorist was on the roads between Milton Keynes and Maidenhead

 

they are a stupid dangerous addition that only half make sense in Europe where they had enough brains to fit ONLY on the offside so one had a chance to see the brake lights

31 minutes ago, Botus said:

in 43 years of motoring only once has it been foggy enough to use the fog light...

Wow, I genuinely had no idea it was so 'location' dependant in the UK. Spend a winter over here and you'll soon learn the value of a rear fog light!

47 minutes ago, Botus said:

so one had a chance to see the brake lights

An important point that - often the brake light is eclipsed by the brightness of the rear fog viz Rover SD1......

Sierras and Granadas had it right, fog light was the tail light fitting using a 21/5W, and the brake lights 21W were separate.

Some cars would also extinguish the rear fog when on main beam, on the basis that if you use main beam, then the rear fog was not needed.  I can remember driving behind such a car in good visibility on night and watching this damn light go on and off in antiphase with that car's main beam !