Hi, each box contains 12 panels that covers 32 sq of space. 16x8 ft is 126 sf. Generally you want to get 10% extra as you need to cut the panels and etc. So you would need 4 boxes plus 6 more panels. Since we don't see single panels here, you would have to get it from our company store. The panels have self-adhesive tape on the back, all you need to do is to peel off the protective cover and stick them to the wall. Just make sure the panels is level and plan out your installation. Hope this helps. Thanks

Hi, I am looking to use this as a ceiling application. Has this been done before?

Yes, we have had customer using it as a ceiling tile. If you plan to use it as a ceiling tile, it is recommended to paint them first as it will be easier.