In my tank, this coral sits 10" from the water surface and another 6" from 250W 14K Pheonix. It grows fast, one of the faster sps in my tank, mind you I have a ton of current blasting at it. In this condition the coral became a pinkish color with blue tips and stubby growth pattern. I left it there for 3 months to put on some size and then I moved it back down to about 20" from the surface, still in direct sunlight. The color has gotten deeper, more reddish now, and the growth is still going well, but now as fast. The initial frag was about 1.5" and 6 montsh later it's bigger than a baseball. It's has to be one of the faster grower I've ever had. My plan is to let it grow another inch and then I will place it in the shade to try to achieve that deep red coloration. I was skeptical of the deep red color at first but as I experiment, I feel that it will be achieved.