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LED light calculation - my case and overall

Discussion in 'Lighting Requirements' started by RGBxLT, Aug 25, 2017.

  1. RGBxLT

    RGBxLT New Member

    Aug 25, 2017
    Likes Received:
    Hi All,

    so I am planning new tank: 150x40x50 cm, which makes it 300 l tank. My 150 and 40 cm are "locked" options, and height could be increased/decreased, but for me 50 cm seems to be right one.

    As all parts can more or less be selected and bought easily, lighting is difficult one. I don't want to spend huge amounts on best known products, and other cheaper LED solutions are not available in my location due big length.

    So only option I have - is DIY. I have friends with knowledge on tech side, so it should be fine. But first - I need to specify what I want.

    So question is - how many lumens in total I need for high-light requiring plants ("high-tech" tank) for my tank? I red many forums, and I am not quite got this answer.
    In one place I found that 40 lumens/l is requirement to consider it high-light. Then in this case, I would need about 12000 lumens of light for my 300 l tank. Which in my calculations usually falls on 120-130 W of LED.

    I know that lumens are not only measure :) the light i look for will be:
    ~6500K temp. - but i will mix it - most cold white, some neutral white, some blue.
    - color spectrum focused on blue and red waves.
    - PAR - that is difficult part, usually this information not provided. So the goal will be to place light as near to water as possible and to have dimmer to reduce/increase if needed.

    Sorry for long text :) many thoughts in one place :)

  2. Culprit3

    Culprit3 Aspiring Aquascaper

    Apr 21, 2017
    Likes Received:
    I would go off of PAR. I think its generally 60+ PAR is high tech. Some people say 80+.
  3. keithgh

    keithgh Moderator Staff Member

    Jun 16, 2011
    Likes Received:
    Melbourne Australia

    This is certainly one for the DIY and lighting experts.

    I am positive Zeus would certainly be able to assist you.


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