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Mars Hydro
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thanks for the info, Celt.
You are right flexy. My own tests on the Mars II 900 I bought for my 3'6x3'6 (approx. 1mx1m) suggested that the optimum distance for that light in that space was between 16 and 26 inches. Closer than 16 inches and you weren't getting the full effect of the light and above 26 inches the intensity dropped off. I was reading a full 30k+ LUX in the 16-26" range