your original bulb configuration would be the best
try not to run to many bulbs between 17,500 - 22,000k ratings. These bulbs are great for color from your corals but you will loose growth rate with them. Run a set up like that down the road when your growth rate is to much and everything is getting crowed.
Its the joy with t5's, but right now i am really content with the output of growth and color.
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