No way is 220w of actinic enough to offset the intensity of 800 watts of 10k XM's. If I was to do it over, (and probably will) Id most likely use 250 watters just for that reason. My tank is very white, and I mean powerfull white, with a hint of blue. I think it looks pretty awesome, however, it can always look better....
Youre more than welcome to come by and check it out before you make a decision.. Just let me know....
Jim