I installed the CoralVue 250 watt 20 k on 12-26-2003 and love it. I have it on my 70 gallons that is 24" deep and it penetrates to the bottom nicely. Some say the 20 k is too blue but i dod not think so. i supplement it with my original set-up 36" NO Flor. one white and one actinic. my tank...