LED's is one department you don't want to go cheap on. The investment will pay for itself, and there's many lights out there that have a good track record and plenty of controllability. Other thing you need to think about when it comes to LED's is costumer service, you never know when you gonna need some help. I will save my money and go with a single Radion with their new wide lenses that cover a 30 x 30 area per light. Any of the Radions will work for your tank, I believe you can find the G2s for 550 online and even cheaper use, actually there's a guy I this forum selling two for 800 and willing to sell them separate for 400, can't beat that! Just my two cents, good luck!