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light spread question

Discussion in 'Lighting' started by JJ..Bequiet, May 6, 2011.

  1. JJ..Bequiet

    JJ..Bequiet Prolific Poster

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    If Your tank is 6ft and your light is 5ft and you suspend your light say 12" to 24" above the tank, will the 6" gap of space on either side of fixture affect the light spread where i would even have to be concerned with whats planted at the ends?

    I'm looking at getting one of these two
    http://cgi.ebay.com/5-Tek-Light-T5-HO-Fluorescent-Fixture-/120671907762?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D5%26po%3DLVI%26ps%3D63%26clkid%3D8964801860442441450#ht_1091wt_900

    http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250732403359&category=46314&_trksid=p5197.c0.m619#ht_500wt_1149
     
  2. Gerryd

    Gerryd Plant Guru Team
    Lifetime Member

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    Hi,

    The PAR values at these locations will be LESS than if directly underneath the bulbs, but I don't think it will be as bad as you may think. That is a good distance above for one thing which does provide a good spread already.

    I don't think it will affect decent growth that much assuming all else is in balance. Depends of course on which species you place on the ends :)

    Are you using c02 and EI? Is it non c02? Etc, etc?? Substrate???
     
  3. JJ..Bequiet

    JJ..Bequiet Prolific Poster

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    yes co2 ei, ada amazon type if i can find 8 9L bagsd anywhere for sale..
     
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