The Planted Tank Forum - Conversation Between Hoppy and Crystalview
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Conversation Between Hoppy and Crystalview
Showing Visitor Messages 1 to 2 of 2
  1. Hoppy
    05-11-2009 02:44 PM
    Hoppy
    I don't think I said anything about the distribution of PAR readings top to bottom. You can't control that distribution, other than by raising or lowering the light. The higher the light is raised, the less variation in PAR from top to bottom. But, as you raise it, the PAR drops everywhere in the tank. With the light right at the top of the tank, it will always have high light intensity at the surface, unless it has far too low intensity at the substrate. I'm still thinking about that subject. The more I think about it the better I like the idea of pendant lights.

    But, in general, low light is in the neighborhood of 40 -50 PAR units, medium is in the neighborhood of 50-100 PAR units, and high light is more than 100 PAR units. Different people have different ideas about what those values should be, so those are just mine, for the moment.
  2. Crystalview
    05-11-2009 04:51 AM
    Crystalview
    I misplaced what you said the readings for the PAR should be for a high, Med and low in the middle and on the substrate. Can you share this info again Thanks Marica

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