I started with the grey photochromatic lenses and they work great in moderately cloudy to very bright conditions but did NOT get clear enough on dark, snowy days. Upon EO staff suggestion, I purchased the pink photochromatic lens and they are MUCH better in dark conditions. I even used them for night skiing! So I still have not found the single perfect lens for all conditions, but these two should cover just about everything. (They also sent me a gold sunny-day lens I have yet to try, will report back.)