I would recommend the Blue Iridium lens for any lighting condition. I bought this lens to replace a Pink Iridium lens that i had scratched the inside of. At first, I was going to purchase a straight up replacement but decided to do a little more research, since I wasn't always pleased with the contrast that the Pink Iridium lenses offered. Although it let more light in, it didn't always offer enough contrast in overcast conditions. While doing research on Oakley's website and using their lens/lighting simulator, I came across the Blue Iridium lens. At first I was a bit skeptical because on paper, it actually let less light through, which I thought would make it harder to see in overcast conditions, but let me tell you, something about how this lens filters out blue light does wonders for creating contrast in low light conditions. It works great in sunny conditions as well. I considered buying another lens for sunny conditions before receiving this lens, however, this will be my primary and only lens.