Pretty much went off the papers that came with it... 18-24" is the sweet spot for those lights.Yes this is my only light. It's a 2000 kingplus so I figured the one should cut it in my 3X3 tent. Not a massive operation by any means. I sure hope that this light does well in my setting. So since you literally have experience with this brand of lights how did you measure your distance from plant to light during the different stages of growth.
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i run 19/5 just to be odd 
most people run lights/fans/extraction etc. full blast from the start like before plants,so they can monitor and dial in temp and humidity highs/lows and averages. light height again follow manufacturers guidelines,but dont be scarred to experiment a lil bit.

. It’s all cool, but a good question with a good lesson. 18-24 is a very good rule of thumb, but keep an eye on ur little ones.
LAh my second half didn’t post, lol. Just experiment with height. I would personally rather have a stretch than burn. But test it out, get to where you think is comfortable. And just try stuff out GrowBro. That’s one aspect of growing, get used to ur environment is a big thing. We all want you to succeed. But failures are awesome also!
