Lighting.....

Discussion in 'Battlecorals' started by SPotter, Oct 4, 2016.

  1. wopadobop

    wopadobop Active Member

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    To represent that graphically
    B0F12D00-CB5D-4EB7-9E72-89A96BBB3A81.jpeg DD7FE8B8-DB35-48BA-8901-AEB414077B81.jpeg
     
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  2. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Exactly.
    OR, put two of them lower.
     
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  3. GoldeneyeRet

    GoldeneyeRet Well-Known Member R2R Supporter R2R Excellence Award

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    Or, put two of them higher?
     
  4. wopadobop

    wopadobop Active Member

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    There is a diminishing return on light spill at some point I’m sure lol
     
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  5. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    On the pictured example no.

    Draw that tank in pencil and put two of them low , and the lines of light in the tank.
    The upside down V will intersect , and accomplish a similar task.
     
  6. GoldeneyeRet

    GoldeneyeRet Well-Known Member R2R Supporter R2R Excellence Award

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    Wouldn't two higher give more light bouncing around just as it does with one?
     
  7. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    That becomes a question of dimensions.

    If the higher light picture had the light lower , and you added the second light the spread would be similar.

    It's likely the two lights would only need half as high as the first, depending on how far apart they are.
     
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  8. GoldeneyeRet

    GoldeneyeRet Well-Known Member R2R Supporter R2R Excellence Award

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    Oh that makes sense. There is an optimal ppint in each set up and it varies with dimension spread etc.

    How do we find this point in a real world application?
     
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  9. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Honestly, begin by drawing these concepts on paper.
    Also look at the specs on manufacturers sites.

    You can also take your light and put it close to the floor and slowly raise it up and actually see what happens.

    Then, when you get ready for a build, take your best guess.

    Like this , two kessil a 360 on a 48 in wide tank ? Or four Kessil 160?


    Me , I'd do six, but I'm a sicko.


    I have theee 16in bb on a 48w tank 8in from the water at 30%.
     
  10. GoldeneyeRet

    GoldeneyeRet Well-Known Member R2R Supporter R2R Excellence Award

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    Set it on the floor. ..what a great idea. The great ideas are always so simple...

    I'm off to take down my lights lol.

    This has been the most helpful thread i have read on this confusing subject

    Thanks to all who shared!
     
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  11. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    I'm a simpleton. What can I say.
    I also shine gigantic lights at the wall in many many houses and stages for a living.

    I used a max razor in this one.

    https://www.reef2reef.com/threads/lighting-upgrade-with-a-lux-meter-saltyfilmfolks.248417/
     
  12. GoldeneyeRet

    GoldeneyeRet Well-Known Member R2R Supporter R2R Excellence Award

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    Simpleton, I don't think so but you are certainly illuminating!
     
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  13. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Hahaha !
     
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  14. Battlecorals

    Battlecorals Aquaculturist R2R Supporter Gold Sponsor

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    yeah thats pretty much my take exactly. the only complaint I can come up with for higher fixture, is bleed over, in fact I absolutely hate it myself, but I'm still a "hood" guy just for the reason. I really like the discussion and input here,guys
     
  15. saltyfilmfolks

    saltyfilmfolks Lights! Camera! Reef! R2R Supporter R2R Excellence Award Reef Squad Leader Photo of the Month Award Build Thread Contributor

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    Yup. That's also why I opted for the 3 bb on the canopoy. Best coverage possible , and I can still see the TV.
     
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  16. wopadobop

    wopadobop Active Member

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    Yeah at some point your gonna lose some radiation escaping over the top of the tank. At which point i think that’s about as high as you would want to go .
    @saltyfilmfolks has a great point about setting them on the floor and raising them up until they hit the spread you want. That’s a great way to measure your hanging height without over doing it. Simple yet elegant.
     
  17. mcarroll

    mcarroll Valuable Member R2R Supporter R2R Excellence Award

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    I've done a lot of those....beggars can't be choosers – those diagrams take time to make. Level of complexity is reflected in the cost! :D

    Here's maybe the best one I've made that shows proportional reflections....it's a modelled Kessil:

    One showing "too high" resulting in spill and loss of internal reflections:
    48x20_2KessilHigh.jpg

    And one showing a more ideal mouting height with no spill (this one shows above- and side-veiws):
    48x24_1.png
     
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  18. Battlecorals

    Battlecorals Aquaculturist R2R Supporter Gold Sponsor

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    Hey very cool.
     
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