Since I have both consider me an expert.
Its no problem with my level of tint mentioned above. I went through several night flights before I even realized that I was supposed to remember to pay attention to it. Your eyes adjust and I do not notice ANY difference, although clearly there is.
What you do notice is the "bake factor" being significatly lower in the tinted. I know nothing about UV-A, B or F. I only know that my head thanks me, and My wife, who is very sensitive to sunlight, loves the tint. Takes better pictures from the inside too and there is much less glare from the inside reflecting around to screw up your nice picture.
I do not know what the downside is of a light tint is. I only know upside for me.
My 2 cents.