Lighting spectra, Photosynthesis, and You

  1. USMC4Life

    USMC4Life Well-Known Member

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    I am very surprised. But that's good. Test it out put a frag in and see how it handles it.
     
  2. David Engh

    David Engh Well-Known Member

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    So what should my lux reading be on the meter
     
  3. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad

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    min 25,000 lux at 8 in. as an estimate. not going to be much par available though i would guess. very iffy.
     
  4. David Engh

    David Engh Well-Known Member

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    I will test it out when I get home from work an let you know what I find out. Thanks for the info and help. Will keep ya posted.
     
  5. mcarroll

    mcarroll Well-Known Member R2R Supporter R2R Excellence Award Partner Member

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    Probably anything around 15,000-20,000 lux would be OK, but anywhere between that and 50,000 lux would be pretty ideal. Up to 80,000 lux is accptable for most corals, but can be a cause of some oxidative stress too.

    More light is not necessarily better - corals are low-light specialists, really - but you do have to satisfy their minimums. Their minimum is called thier "light compensation point"....where they get enough light to cover costs of metabolism. Aka "Enough light". Most corals seem to hit their compensation point somewhere around 5,000 lux, plus or minus a few K. More light than that is gravy! :)

    Bonus article on corals adapting to low light and high light situations:
    "Primary Production and Photoadaptation in Light- and Shade-Adapted Colonies..."
    http://rspb.royalsocietypublishing.org/content/222/1227/161.short

    Oh, also, the table of lux values here should give some more perspective:
    https://en.wikipedia.org/wiki/Lux#Illuminance

    Samples are taken at the surface so it doesn't matter. :)
     
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  6. Justin Nguyen

    Justin Nguyen Member

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    Great article. Thank you so much.
     
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