I have a 60 gallon tank and need moderate lighting. Which would be appx 120 watts, correct? I already have the thingy for the lights, I only need the actual lights. I need 36" lights, and can only fit 2, but all the lights I am finding are only 30 watts. Obviously with two that is only 60 watts. My tank is not super deep though, and I really only have room for 2, MAYBE 3 if i bought a whole new setup for the lights. I just need some ideas or some help w/ buying lights? am I not understanding something? TIA!!!