We were at the Poly in May and just loved it. I too agree the lighting is a little dim in the bathrooms. So, here is what I did, on either side of the mirror there are these kind of tiki looking lamps with a brownish shade around them. I took the shades off while I was getting ready/putting on makeup. They just slide on and off. When you take that shade off it brightens up the entire bathroom. Look on one of the threads with room pictures for Poly. You'll see in one of the bathroom pictures what I am talking about.
The lighting is not horrible, it's just a little darker than in most hotel rooms.
Hope that helps! Have a great trip!