I have 2 x 65 pc (I - 10K, 1- actinic) over a 29 gl and I have a frogspawn that has grown from 5 heads to over 20, I have had it for over 2 years, but I keep it up high in the tank. Also, I have an open brain up on top of the rocks that is doing great and I have had it for about 9 months now. I have zoa's all over (up high grow better) I have a candy cane in the middle that grows slowly, and I have a short tentacled plate on the rocks almost at the bottom that has over tripled in size in the 1+ yr that I have had it. I have
blue mushrooms at the bottom that grow very well and are actually all over the tank - they have been in about 2.5 yrs.
I have had no luck at all w/ Xenia, it grows really fast then dies, usually about 1 - 3 months.
IMO it's not enough lighting for any SPS, though.
Don