Presently I have a planted 125 gallon aquarium. I am using pressurized co2 along with ~400 watts of power compacts. I have been researching going to leds for a while but I just need a little more help. I have seen the par charts but I guess I am not smart enough to figure them out. If I put a 4 foot and a two foot aqua 2 on my tank does this become a medium light tank? Or in other words will these two fixtures be all I need on a 6 foot light hood.
It'll put you in on the medium/high light side for stock under or front/back of the fixture. I do question the remaining 2' of your aquarium, though, as I do not know the specs of the aqua2 you are referring to. Did you mean Ray II 2'? The LED spread is ~120 degrees so I'd venture to say though there is no fixture on either 1' side of the tank if you were to go with a single 4' fixture, there still may be ample light reaching those corners (keeping in mind that taller plants will surely create a further void as they are blocking the light from such a small source).
Here's a pic of it on a 24" deep tank. As you can see there's quite of bit of spread spill: