They're 250's but i'm hoping the actinics will be strong enough to at least cast a bit of color in the tank against the MH's.

My first plan was to use 4 x 72" actinic VHO's but after finding out I can add 3 to a single ballast without any problems I figured i'd try it that way. If it works out fine i'll end up selling that extra IceCap 660 ballast I have.