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    Thread: Is this a good LED layout?

    1. #1
      sushi is offline Registered User
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      Is this a good LED layout?

      Hello, I am thinking of driving 4 strings of LEDs with some LDD 1000's I have. I have calculated the total voltage of each string at 1000mAh and they do not exceed the 24v of my power supply. That is the gist of it right? I add up the forward voltage of each LED at the current I will be running? Here is a table of the LEDs and a picture of how I plan to wire them.




    2. #2
      unbereefable is offline Registered User
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      What brand of led? And yes, iirc, add the Vf gets you the total. But if your PS is 24V, I'd add 2 more led to each string. Just to max out its potential. What kind of power supply you running?

    3. #3
      sushi is offline Registered User
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      Thank you for the quick reply!

      The LDDs consume 3v so I could squeeze one more onto the 5-LED strings, if I do that would it be better to add more blue or more white? I currently have 12 white and 10 blue.

      anyway these are the exact LEDs they are cree from reefledlights.com

      Blue https://reefledlights.com/shop/cree-xt-e-royal-blue/

      White https://reefledlights.com/shop/cree-...ool-white-led/

      Power supply is Meanwell HLG-120H-24 (no suffix) http://www.meanwell.com/webapp/produ...?prod=hlg-120h

      If I knew a little more when I bought my power supply I would have gotten a 48 or 56v one so I could use fewer drivers. Maybe the cost was a factor, I am not sure what I was thinking at the time.

    4. #4
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      jason142 is offline SDR Moderator
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      I would add more blue then white anyway. With that amount of white you most likely will not get the pop in the corals that everyone loves.

    5. #5
      sushi is offline Registered User
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      I am more concerned with actual growth and health and propagation of the corals than with how they appear under the blue lights, I really like to see how they look under natural light. So if I am going for growth and health is heavy on the blue optimal?

      I thought I heard something about red light helping growth too, maybe I should Google a little more
      Last edited by sushi; 05-15-2017 at 06:19 PM.

    6. #6
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      Last edited by sushi; 05-15-2017 at 09:04 PM.

    7. #7
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      Personally, Id drop a few Uvs. Drop in something that ads the 430 to 465nm's. The 450's may be to narrow to cover that range.

    8. #8
      sushi is offline Registered User
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      Quote Originally Posted by crabbysd View Post
      Personally, Id drop a few Uvs. Drop in something that ads the 430 to 465nm's. The 450's may be to narrow to cover that range.
      Here are some:

      420-430 http://www.rapidled.com/ultraviolet-violet-uv/
      440-445 http://www.rapidled.com/ultramarine-...led-440-445nm/
      440-460 http://www.rapidled.com/philips-luxe...oyal-blue-led/
      450-465 http://www.rapidled.com/cree-xt-e-royal-blue-led/

      Any recommendations on how many i should use, and which ones I should swap them with in my design?
      Last edited by sushi; 05-16-2017 at 09:40 AM.

    9. #9
      crabbysd's Avatar
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      Quote Originally Posted by sushi View Post
      Here are some:

      420-430 http://www.rapidled.com/ultraviolet-violet-uv/
      440-445 http://www.rapidled.com/ultramarine-...led-440-445nm/
      440-460 http://www.rapidled.com/philips-luxe...oyal-blue-led/
      450-465 http://www.rapidled.com/cree-xt-e-royal-blue-led/

      Any recommendations on how many i should use, and which ones I should swap them with in my design?
      Honestly I'm not a designer. That spread looks pretty good but how many to produce what is the trick im not familiar with.
      If you contact Bill at reefled hed be much more able to tell you. Theres 2 things to keep in mind besides growth. Mainly its visual. Look at Sbreeflights spectral graphs, also Reefleds prebuilts, ai etc. Youll notice many of them lean heavily one way or the other. SB's are Royal blue weighted the Bills are 564 weighted, hes an old school MH guy so he leans to the true 20k range but is 445 456 weighted like a kessil.

    10. #10
      sushi is offline Registered User
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      Ok, thank you for enLIGHTening me I will think through it a little more and then ask Mr Bill if he thinks it looks like a good setup or if he has any recommendations.

    11. #11
      cshplumber is offline Registered User
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      What about your green & red & orange? Everybody who's anybody has these colors in their LED's.

    12. #12
      sushi is offline Registered User
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      Quote Originally Posted by cshplumber View Post
      What about your green & red & orange? Everybody who's anybody has these colors in their LED's.
      I don't care, I just want blue. Blue lives matter! Oh and purple. Purple lives matter!

    13. #13
      unbereefable is offline Registered User
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      I'd ditch the perimeter whites chip, the inner violets, and swap some of the cool whites with warm white. Preferably a warm white with a high CRI. The warm white will help out with the red spectrum too. When I build led arrays, I like to go 2 or 3:1, blue:white. Usually end up with 2 RB, 1 B, per white. I like the luxeon better then the Crees. You can also add lime to the mix. I'd stay away from adding to many colors. Once you factor in cost and time, it's usually cheaper to buy a cheaper Chinese fixture. Like the ocean revive slim fixtures. Pretty good and really similar to what you're already building. I personally stopped building fixtures with lots of single chips. You could easily run some high powered LED chips and shave the size and work down. I like using bridglux vero 10 and philips luxeon K multi chips.

    14. #14
      sushi is offline Registered User
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      Quote Originally Posted by unbereefable View Post
      I'd ditch the perimeter whites chip, the inner violets, and swap some of the cool whites with warm white. Preferably a warm white with a high CRI. The warm white will help out with the red spectrum too. When I build led arrays, I like to go 2 or 3:1, blue:white. Usually end up with 2 RB, 1 B, per white. I like the luxeon better then the Crees. You can also add lime to the mix. I'd stay away from adding to many colors. Once you factor in cost and time, it's usually cheaper to buy a cheaper Chinese fixture. Like the ocean revive slim fixtures. Pretty good and really similar to what you're already building. I personally stopped building fixtures with lots of single chips. You could easily run some high powered LED chips and shave the size and work down. I like using bridglux vero 10 and philips luxeon K multi chips.
      Awl dang! I just finished updating my layout. I will post it anyway, and then look up the multi-chips.

      The reason i am not considering a chinese box is that I am just gonna rewire these into my LED hood and they wont fit inside.



      Please note: Tile color does not indicate LED color.
      Last edited by sushi; 05-16-2017 at 09:03 PM.

    15. #15
      crabbysd's Avatar
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      Quote Originally Posted by sushi View Post
      Awl dang! I just finished updating my layout. I will post it anyway, and then look up the multi-chips.

      The reason i am not considering a chinese box is that I am just gonna rewire these into my LED hood and they wont fit inside.



      Please note: Tile color does not indicate LED color.
      You seem to have the spectrum covered. Are they going to be controllable?

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