I'm working on a similar project - I have a 38" diameter hoop with a WS2801 LED strip inside (96 pixels.) The one thing to keep in mind is balance. The film might not weight much, but the batteries to drive the controller and lights will add weight to the hoop. This is primarily why my project isn't completed yet ... trying to work out ways to balance it. Good luck with yours, I'm sure you'll come up with an awesome product for your friend.