Fog lights would ideally be red or even better: infra-red, but the problem is that the eye is not very sensitive to red, so you either need very powerful lights, or you move to a slightly shorter wavelength and get a compromise between sensitivity and glare
Fog lights would ideally be red or even better: infra-red, but the problem is that the eye is not very sensitive to red, so you either need very powerful lights, or you move to a slightly shorter wavelength and get a compromise between sensitivity and glare
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