I have an XM 10K right now running alongside a 20K on my 75. It used to be running alone. I love the color, and the growth response I've had from corals is amazing! Very crisp white light(till it hits about the 9 month mark), then its not as crisp white, but still white, no yellowing. At about the 11 month point, it then begins to show a really crappy white, but it is still white! This is my 400W SE, running off a PFO ballast.
Cheers,
Chris
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No more tanks  - Laying off the ReefCrack for awhile!
Cheers,
Chris
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