This is awesome! Welcome to the 20K club! I dont have a whole lot of experience with MH but I did have 10K to start with then I got the XM 20K bulbs and it was a little too blue for me at first but I love it now! I wouldnt have it any other way. Everything seems so much happier with the 20K vs the 10k bulbs. I am watching the color transforn from a dull color to a vibrant color in my corals. Amazing what good light can do.