Hmmm, interesting, but the final statement (that fog lights "don't exist") is plainly untrue. The main feature of a fog light for a car is its beam pattern. It gives a wide flat beam, to better illuminate the verges without dazzling. They are also best mounted low down (the automotive equivalent of carrying your headtorch in your hand) but yellow has been used for years because it is percieved to give better visibility in fog. That might be to do with peculiarities of the human eye but anyone who has had a Petzl Myo or Duo with LED and halogen (or even an old Zoom) will know that a yellowish light seems better in mist. It may be to do with dazzle though; - reflected yellow light doesn't dazzle as much as reflected white light!Originally Posted by Baggins
Is it not because yellow is less likely to dazzle?
http://www.gi.alaska.edu/ScienceForum/ASF5/593.html
I'll have to check it out.
I think next time I go for a night run I'll have plenty of spare lights
Bill
Some experimentation is obviously required..... wonder if you can still buy that pale amber stuff you used to paint onto your headlights when going to France?
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