The light has only been fully running on the frag tank for about 4 weeks. I gave the initial frags about 3-4 weeks of an acclimation period. I didn't expect I'd be giving any kind of a review after only one month as my normal experience has always been that when most corals are moved into a new environment with new lights, etc that they no-grow phase for up to 6 months or so. That hasn't been true with this light and I'm a little flabbergasted by it. Note that this is just my personal observations and mileage may vary. I didn't so any counts of initial heads of Zoa types put in, but I am "sure" tha I have a number of new heads on all colonies. I have a small "colony" of Magicians that I picked up from Kremis and my recollection is it was 5 heads -- now it's 8-9 heads. SPS frags are showing good growth tips, but again I never measured. I would chalk all that up to wishful thinking except that I can visually show growth on a few chalices that are already encrusting new frag squares that they've only been on one month. All chalices show growth, but the pics below show them encrusting and growing onto the one-month old plugs. I think that's fairly significant in a new environment for corals that usually grow very slowly. If you look at the pics you will see the front edges of the corals spreading nicely and in a measurable fashion. So take it with a grain of salt at this early stage, but I think it's pretty exciting. On the other hand, I am definitely biased. I paid a lot of money for this damn thing and am invested in it working.