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Originally Posted by McNasty
I do not know if this is true becuase i run 14k MH, but I have heard that corals will grow faster under 10k lights but not have the color of 20k lights.
Under 20 K lights color is the best but growth is slow.
I personaly went for looks in my tank when i set it up, coral growth is not to bad.
Maybe other people who have run different bulbs can give there input on color and growth.
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It is true, there is greater PAR under whiter light. The more blue, the less PAR, and less coral growth.