I think I might have just had a crazy idea! This would solve all my problems if it would work. Now before you laugh at me, just note that I have no idea about MH bulbs, never had them, never really looked into them...
With that said... Would a 175w MH bulb on the left side, and a 250w MH on the right side of the 120 gallon tank be noticible? Both would be the hamilton 14k bulbs. This would solve all my problems because I would be able to run the 175 in my 20 gallon with no problem... and when I upgrade and put it in the 120 gallon I could have some softies up toward the top on the left side, so I wouldnt worry about burning up some softies.
This would work if the different in light intensity is not noticible. Does anyone know if this idea would just completely look... weird?