Your question is flawed. It seems to me that there is no 'one' MH look. The specific MH bulb(s) used will determine the look of the tank. And that can be anything from 20K to 6500. As far as LEDs go, most of the major manufacturers use a combination of cool white, blue and royal blue. I have 4 AI Sol Super Blues over my 90gal bow and am currently running them 60W, 50B, 50RB at peak and that gives a very nice '14K' look.
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