On my drive to work, as I crest the hill, there is a traffic light about 3/4 of a mile up the road. I can see the light if it is Red, but I don't see it if it's Green. Not sure what this means for my shooting. Studies say Green is brighter. Some even make a case for Orange. Shooting environment obviously plays a big role as far as contrasting background colors, as well as brightness of the day. Shooting glasses with interchangeable lenses and a prescription insert, bought as a kit, seem to make the most sense for me. Pricey initially, but worth it in the long run.