I've got an aquaticlife 4-bulb with ATI bulbs and I'm having mixed success. I'm currently keeping a Humilis, Monti cap, another branching green acro, sour apple birdsnest, and light blue bushy acro. Everyone is doing great except the bushy acro is bleaching on one half. I haven't figured out if its due to too much or lack of light, or not enough flow at this point.
*Note: All of my SPS are in the top 1/3 - 1/4 of my tank.