Black or smoke on really bright days with a light back ground, amber on sunny days but with a dark back ground and yellow on overcast days or in the woods under a leafy canopy works for me. Filters out the glare and allows me to see things clearly and in focus compared to bare eyes or plain glasses. I haven't used the black ones since I left the desert but I use the amber and the yellow a lot.
I never tried the pink or blue so I have no idea how they work.
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Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.
--Daniel Webster--
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