08-21-2011, 07:41 PM
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Well, the higher in the Kelvin range you go, using 150w, you start to lose intensity, and depth penetration. If you were using 400w and 20k, you wouldl be in good shape. I use 175w 14k, and love em. I have used 10k, to yellow, 12k, still a bit to yellow for my taste, 14k, love em, and 20k, deep blue, like the color, but not enough light penetraion for my stuff, so I went back to 14k. this is all the light I use, no actinic lighting.