No, get the narrow versions. I have two A350s on my 120 and it barely cuts it. I should have gotten three, but it's not absolutely necessary since I have the whole 'two island' thing going on. You'll definitely want the narrow version since your tank is so deep, and may want to up the density from 3 to more to make up for it. A 4' tank CAN be lit with 2, but it's much better with 3.