You and I were talking about that on another thread somewhere...... I found those epoxy filled ballasts from Advance that will fire 2 400w MH bulbs. Gonna try to rig that setup first first and if I need more light then I will have to add. I think that 2 400w 10000 k bulbs and maybe a CF for actinic would work for that deep of a tank. what is your take on it?