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Originally Posted by where2
Thanks for the updates Nate & Jeff. At some point, the 20+ acres of farmland my wife and I have may benefit from this soil and lighting data. For that matter, the 10 bare root blue spruce seedlings I planted last summer may have benefit from the soil data, had I known it at the time...
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Glad I could help. It is crazy how quickly technology has transformed. Even though I did this project earlier this year, these LED COBs are old technology. If I was to build this grow light again, I would go with these:
110v led cob grow light | eBay