Tested them yesterday with an Oakley rep (he was at a dealer) and he said they are meant as a replacement for the HI Yellow lens. They are a lot lighter than Prizm Rose and less extreme in contrast. I might get a set if they make them for the Airbrakes (and I get a decent discount). They are meant for conditions where Prizm rose is too dark and for me that would be in low light and low viz and when night skiing. At the moment they aren't a must have (I use Prizm Rose the most, Prizm Torch and Black more when we get brighter conditions in the second half of the season.)