MIGrampaUSA
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I have four 240w quantum boards in a 5 x 5 x 80" tent. I pretty much do the same as @BigCube. Start at a dimmed setting and then brighten them as the grow progresses. I also have two 240w quantum boards in a 2.5 x 5 x 80." I'm just getting started with my winter run. This will be the 3rd grow with these lights.Thank you @BigCube for the reply, nice setup you have there. Will do the same as you suggest, stay safe and high