jonthefb, i can probably answer that one, I have pretty close to the same system but with a 180. He probably has an acrylic canopy, not to mention not much room, but the halides would get way to hot underneath unless you had the light raised from the tank!
Also, caribbean guy, that look like a fish only tank from far away, if it is, why do you have so much light?
Nevertheless, it does look great!!