Well, a lot of stuff used to look pretty cool at night but my peppermint shrimp has taken to poking through all of my LPS when the lights go off so he can grab any food that might still be around. The little jerk. That being said, candy canes for sure look great at night and my favias tend to open up and spread out too when the light fade. I don't get much of a feeding response from my SPS (that I see) but I know @dball711 has some great pics of his opening up at night.