I wear contacts and lights are a tough thing for me. In the summer, I rarely play at night so it's a non issue. But, it's unavoidable in the winter months. Even if you can start right at 5, you'll end under the lights in January.
I definitely shank a few more balls per match, but it would be odd for me to lose to someone that I am significantly better than. It's the even match ups that can be skewed.