I have seen a good number of threads and stuff and replys to threads as to what to lense to choose for Lenses. I think this would help you out. Press Control F for pc users to look for a specific lense color light condition.
Emerald Iridium Lens:good for blue bird days mid season Medium to bright light
Blue Iridium: Good for almost anything. Good for spring weather Medium to bright
Black Iridium: Another all purpose for Mid winter
Clear: Night Skiing
Fire Iridium: Sunny days Medium to bright
G30: All around Medium to bright
Gold Iridium: Sunny all purpose contrasting.
HI persimion: Flat Light to Low light. Slightly more versitile
HI: Flat to VERY FLAT Good for those very very cloudy snowy days.
Permisimion: Flat to low light: Boost blue light.
High Intensity Amber Polarized: Medium to bright. Just polarized
Hope this helps some of you