Platygyra AKA Brain Maze

[nrobinson1014]

So I am looking at placing a platygyra (brain maze) in my 20g nano. I have always been fascinated with these since I was a little kid, but I have never had an LPS before and have no idea what to expect. I know they feed at night with sweeper arms or at least that is what I have been told. How long do these sweeper arms extend and how dangerous are they for my fish (clowns, gobies, wrasse "reef safe of course")? What about lighting requirements (my daylighting consists of 54 watts of LED lighting 60/40 split cool white and acitinic blue. Any information would be greatly appreciated. Thanks