Originally Posted By: bmwjohn
The amber in fog lights is a debateable issue. Amber produces less light, possibly less glare to oncoming drivers, and might reflect less light from rain and fog particles vs white light. All french cars had amber lights at one time....
The French used selective yellow lighting for tactical reasons in 1936. It allowed them to identify the nationality of a car at night. But it does have a side benefit. It reduces the shorter blue wavelength light that is difficult for the human eye to process.
The amber in fog lights is a debateable issue. Amber produces less light, possibly less glare to oncoming drivers, and might reflect less light from rain and fog particles vs white light. All french cars had amber lights at one time....
The French used selective yellow lighting for tactical reasons in 1936. It allowed them to identify the nationality of a car at night. But it does have a side benefit. It reduces the shorter blue wavelength light that is difficult for the human eye to process.