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  1. k dog

    Help needed with COB calculator.

    I am going to build a grow light for a 4x8 grow. I have tried to download a cob calculator but my phone won't open the file. I would like to figure out what the draw at the wall would be and also the par, PPF, etc.If anyone could run the numbers it would be a big help. I was thinking of using...
  2. k dog

    4 X 5 grow room light help needed.

    I am designing a 4X5 grow room and am thinking of using 8 cree cxb3590 3500K cobs. I have two questions about this setup. 1. Will the 8 11,000 lumen cobs be enough to cover the footprint? 2. If it is then should I go with 1 mean well hlg-185h c700 or 2 hlg-185h c1400? I understand that it will...
  3. k dog

    Heatsink help needed.

    First time poster. I am going to build a grow light for a 4X4X7 grow. I decided to go with 5 cree cxb3590 cobs. My question is what heatsink should I go with for a passive setup?
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