I have the 48" Aqualite. It's not the pro version but I did add the moonlites. Overall, I wish I would have chosen a different unit. I did have some problems thefirst time I tried to change the bulbs, as the bulb pins had actually become corroded and fused into the endcaps (where the bulbs plug into.) Unfortunately, the customer service from Coralife was terrible, and it took several phone calls to right the problem and get new parts.
After the new bulbs were installed, I still don't think the unit produces as much light as i would like. Many of the corals seem "hungry" for light looking at their growth and daily expansions while moving them up and down in the tank. (Standard 55g tank) In retrospect, and knowing I am only going to keep ugrading equipment anyway, I would started with hallides or T5. I don't like knowing there are certain things that won't do well...Id like my restrictions on stock to be because of my wallet, not my equipment.