I just had a quick question for some of you guys. After seeing my tank a friend of mine wants to switch from a full VHO setup to one or 2 metal halide, probably using XM bulbs. My question is would one 400 watt MH bulb mounted in the center of the hood perpendicular to the front of the tank, with a good quality reflector be able to reach the majoriy of the tank. Keep im mind he will still be using 2 or 3 140watt VHO's running the length of the tank. It's a 125 gallon and is a little over 60 inches long.