What do you guys suggest? I am at an impass. The LFS told me yesterday not to go with the 20K's because you lose intensity. They suggested 2 150w 10K's with 2 VHO actinic's. I am looking for the most efficent yet compact lighting situation. VHO's take up alot of space and I don't want a huge canopy. I discovered a LFS in Denver that makes a fixture with 2 150w 20K's, ballast, bulbs and fixture for $530, no actinics just the 20k's. They say that the brand of bulb sold is aqualux, however, it is compatable with other standard 150 halide's. Does anyone have a strong suggestion of this? My tank is a standard 75g. 48x18x20. I want to be able to grow the SPS I already have and the clams that I have as well.