Mr_Q wrote:Hot Rodders wrote:Surely in fog it is just as important to be seen by drivers behind you?
Fog lights aren't really to make you more visible in fog - your regular lights will do just fine for that (especially the rear red lights, instead of a potentially confusing white light).
The main idea of fog lights is to provide a lower level light source that doesn't reflect off the fog (ever tried using high beams in heavy fog?).
No, the main idea of fog lights and the reason why they are mounted as low as possible, is to illuminate the left edge of the road under the fog as fog usually sits about half a metre off the ground. Low beam and high beam, which are higher mounted, both reflect straight back off the fog, which is the reason why in fog, the fog lights only should be used.