Thanks Obet,
Temp will not be an issue since I also installed a fairly large exhaust fan and have an upstairs A/C that blows cold air down the back wall and into the canopy. That and the MH will only be on for 4 hours a day to simulate the high noon intensive period. The CFs are more than enough for the other non-MH hours.
The best compliment I got came from my wife Linda, I had just turned on the MH for the first time and she walked in and said "wow! that looks just like being in the ocean now!".....
Now I can't wait to get out on the reef and do some shopping!!!...lol
Chuck