This seems to be a popular question, and the rule I used to see a lot is figure one LED per every 10-20 square inches of surface area. With the advancements as of late and as more and more people begin to convert to LEDs, this rule is getting blurry. So lets use me as an example. My tank is 60x20x24, lots of LPS with some SPS up high. It's currently lit with 3 250W MH's. I'm considering your dimmable premium kits (CW XP-G & RE XP-E). Would the 48 LED kit be sufficient?