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Hi folks. Planning a small grow. 50 x 50 x 90 cm. Got everything pretty much thought up and ordered, very diy, making my own carbon filter, passive intake, 120mm silent pc fan exhaust. I'm thinking a small tower fan to circulate air, but the diyer inside of me wants to mount small pc fans on...

Hi guys, I started researching DIY LED lighting a few days ago, and something has been bugging me. All of the spectrum graphs published on the data sheets for popular CREE and Citizen Electric COBs have a huge cut around 480nm. However, part of my research tells me that is the range of blue...