I don't think my colors are true to life in my pictures. they always appear a bit bluer than reality, unless I turn down the blues for the pic, but then, I'm defeating the purpose...
The corals look wonderful though. As good as any lighting source I've seen if not better.
You can keep them 10" or so. Just enough so they are away from the water enough to not be a danger. What are the optics you have in your fixtures? Mine are the 120
(it just looks like a little bubble), and It's 30" to the sand bed.