right just for clarity fog lights on the front and rear are two different things.. The ones on the front are more like driving lamps. where the low level (height) light emissions are a benefit in adverse conditions as well as being able to be seen seen. They should be used as needed and don't be a "Trev" about using them... The rear ones I have issue with... They should be used if you cannot be seen 100m away as you said.... If, for example, you are on a motorway and it rains then they are not needed and act as a focus point which inhibits driving and also overpowers brake lights... Even