OK, I did a search, and this thread popped up, so I'm going to zombie it and see if there's any news on the outdoor-tuner-visibility front. I just played a couple of outdoor gigs in bright sunlight and could not see the display on my Boss TU-2 at all. Not sure I want to spend $199 to get a Peterson. Other options? A clip-on? A different pedal tuner? What out on the market now, six years later?
TC Polytune. Played several outdoor shows this summer with no issues whatsoever. Best tuner I've ever owned in every aspect and at a very reasonable price.