kelvin

  1. DeVille

    18000 Kelvin for rooting clones?

    Needed a T8 for cloning, so bought the closest I found to a usable spectrum in a local electronics shop. 4000 kelvin. Not optimal, but I know it works. I see the local pet shop sells a bulb for aquariums, but that one is 18000 kelvin - Do you think it would work well for rooting`clones? I have...
  2. Y

    Kelvin rating for MH/HPS different than CFL

    Why is the Kelvin for HPS 2000 and MH 4200 as opposed to 2700 and 6500 for CFL ? At least if you purchase any of the light systems. Those are the bulbs that's provided.