These are "faux" capiz shells -- awesome! http://www.homedit.com/21-creative-diy-lighting-ideas/ for how to make them and this light.
DIY pendant light project
DIY ceiling fixture
Diy pendant light!!
How to replace your "boob" like fixtures without playing with electricity. DIY shades for flush mount light fixtures. PERFECT!! I will be doing this in the hall and the bath... and the closet.