In order to display facebook comments on your page you would normally follow the instructions on this page. This works great if you just have a single page that you want to comment on, but for my scenario I wanted the comment box to appear fresh for each photo that the lightbox displayed.  In order to do this, the first thing you’ll need to do is omit the 2nd bit of code that Facebook generates for you on the afore mentioned page:
Other API Popup Window