so i decided to see what happens to this zoa polyp as i changed the color of the light.... the rest of the polyps were pretty much open all night so i decided to focus in one this one.
it was taken over the period of just over an hour
http://www.youtube.com/watch?v=VagSxOGRBCo
Here is the same experiment with a Prism Favia
http://www.youtube.com/watch?v=ch43Ifw6Z1A
watch in HD for best results