MH lights - what rating?

[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.