Par

Discussion in 'Lighting' started by TaahirS, 26 Dec 2014.

  1. TaahirS

    TaahirS MASA Contributor

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    What is used to measure par?
    Is this instrument waterproof and can be used in your tank or does your tank have to be dry to measure it?
    Who has a par measuring instrument?
    What is the recommended par for SPS, Lps and softies?
     
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  3. Nemos Janitor

    Nemos Janitor

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  4. TaahirS

    TaahirS Thread Starter MASA Contributor

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    Wow! Wasn't expecting that price. Any other info you can add about par @Nemos Janitor
     
    Last edited by a moderator: 26 Nov 2015
  5. dallasg

    dallasg Moderator MASA Contributor

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  6. viper357

    viper357 Admin MASA Contributor

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    Apogee is the best but the Seneye Reef measures PAR as well, it's a whole lot cheaper than the Apogee and has more functions on it, I have read a couple of posts on other forums and the guys mentioned that when compared the measurements were almost the same between the Apogee and the Seneye, perfect for us hobbyists.
     
  7. HOT SAUCE

    HOT SAUCE

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    @viper357... ive heard or read people say that the Senseye is not ment for measuring par on LED lights or that its not recomended for those but rather halides or T5s... is that true ?
     
    Last edited by a moderator: 26 Nov 2015
  8. viper357

    viper357 Admin MASA Contributor

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    Not sure on that one, will have to read up on it.
     
    Last edited: 26 Nov 2015
  9. dallasg

    dallasg Moderator MASA Contributor

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    most par meters need to be calibrated for LEDS AFAIK

    but while we all drool over PAR, its PUR we want
     
  10. butcherman

    butcherman Moderator MASA Contributor

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    we conducted a test with a par meter and a seneye, both results where pretty close only a few units difference.
     
  11. viper357

    viper357 Admin MASA Contributor

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    OMG, why is there not a thread about your test???? :cursing:
     
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  12. dallasg

    dallasg Moderator MASA Contributor

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    we did it a a reef meet, compared DIY LED to AI SOL to Vertix illumilux

    i think also a few months later at Vatso's reef meet
     
  13. viper357

    viper357 Admin MASA Contributor

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    And still we sit with no thread. :(
     
  14. TaahirS

    TaahirS Thread Starter MASA Contributor

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    Shot @dallasg for the links and @viper357.
    Viper use your power :ban:. We want a thread.
     
    Last edited by a moderator: 26 Nov 2015
  15. TaahirS

    TaahirS Thread Starter MASA Contributor

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    Last edited by a moderator: 26 Nov 2015
  16. viper357

    viper357 Admin MASA Contributor

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    Last edited: 26 Nov 2015
    Omnitank likes this.
  17. TaahirS

    TaahirS Thread Starter MASA Contributor

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    Stupid question but can are lumens related to par? Is there a way to convert lumens to par?
    Sorry if it's a dumb Question.
     
  18. RiaanP

    RiaanP Moderator

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    Lumen is the light, that falls within one square meter on full moon.

    PAR is Photosynthetically active radiation. The light available in the wavelength from 400 to 700 that corals can use.

    To compare Lumens to PAR, you need to have it at a certain K rating. And that K rating should be in the range that is available for corals.

    anyway. read up more here
    Photosynthetically active radiation - Wikipedia, the free encyclopedia
     
  19. mariusmeyer

    mariusmeyer

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    Add PUR to your research list as it is more important than PAR.
     
  20. TaahirS

    TaahirS Thread Starter MASA Contributor

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    The reason I asked is because there are apps for measuring lux which can be converted to lumens. So was just interested if that could be converted into par. Then we could all have a par meter for free.:m106:
     
  21. 459b

    459b Moderator MASA Contributor

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    Doubt an app would be particularly accurate. PAR/Lumen meters are expensive for a reason
     
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