attml,
Your new lights look great!
About a year ago I upgraded the lights on my 45 from 3 30w NO's to a Hamilton hood with 175w MH and 2 90w VHO actinecs. What a difference......but I wish I had gone with the 250w MH.
Anyway, when I was acclimating my tank to my new lights I took it very slowly. I had a large hammer coral, large octo-bubble coral, some mushrooms and a cabbage coral. I was trying to avoid the shock and algea bloom I had read were possible side-effects of new lighting.
My schedule started with 3 hours a day for the MH and 4 or so for the VHO's. I increased about 1/2 and hour for each about every 3 or 4 days. At that rate of increased photoperiod, it took me about 6 weeks to increase back to full lighting which for my tank is about 9 hours for the MH and 11 for the VHO's.
I did not have any negative reaction of any kind from my fish, my corals or in increased algea growth taking it slowly, as I did.
(My only problem was not being able to view the tank with the new lights as long as I wanted to!!)
Good luck with yours!!
Jim