mike/cybrsufr...I have to disagree with needing 400 watters for sps. There is a lot more than light that determines coral growth/coloration. Blasting a coral with light doesn't necessarily make it grow more since various coral types only utilize a percentage of the light they receive...even deep water varieties only take in maybe 10-20% of received light, that's why placement of coral's based on light requirements is key. We all know 20K bulb's generally have half the par of lower kelvin bulb's, and the ballast also makes a big difference on the output/color of the bulb's. Cybrsufr, your comparison is not apples to apples, you had a bigger tank, more water volume, possible lower nutrient's and most likely greater stability, coupled with possibly doubling your light output. Not a real fair comparison. See here.
http://www.athiel.com/lib2/lightclub.html
Cheers,