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Thread: Light

  1. #21

    Join Date
    Dec 2009
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    115

    Re: Light

    bend solder tabs up and have at it. I usually insulate under the solder tabs as well. With some thin plastics(like the stuff most consumer packaging is made of).

  2. #22

    Join Date
    Dec 2009
    Location
    Union City, CA, USA
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    441

    Re: Light

    Sounds good. Sure would save a lot of money.

  3. #23

    Join Date
    May 2010
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    57

    Re: Light

    looking good rygh i assume each algae pannel is 30W worth of LED's on those screens?

  4. #24

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    Dec 2009
    Location
    Union City, CA, USA
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    441

    Re: Light

    To be specific: It is 30W total for all 3 screens.
    And only on for 12 hours/day, or it tends to fry the algae.

    The build thread is here.
    viewtopic.php?f=3&t=509

    Good is relative though. It certainly grows algae, and keeps N/P to 0.
    But it is not efficient enough to win over the bubble algae.
    I am no longer a fan of horizontal designs.

  5. #25

    Join Date
    Dec 2009
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    115

    Re: Light

    Hey Rygh can you give me a quick idea as to the lumens or atleast wattage of LED you used over what sq in area?

  6. #26

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    Dec 2009
    Location
    Union City, CA, USA
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    441

    Re: Light

    It is 30W over a 195 sq in single sided screen.
    Lumens does not really work well, since it is mostly red + blue, but noted below.

    8 x Deep Red LedEngin. LZ1-00R205
    - Running 700 mA (low power), 2.9Vf = 2W each
    - About 100 lumens, but not very accurate for deep red.
    - About 400mW radiant flux.
    - Peak wavelength around 660 nm.
    4 x Blue LedEngin. LZ1-00B205
    - Running 700 mA (low power), 3.4Vf = 2.4W each
    - About 50 lumens.
    - Peak wavelength around 450 nm.
    3 x Warm White Luxeon K2 TFFC Star 05027-PWW4-140
    - 140 Lumen
    - spread wavelength

  7. #27

    Join Date
    May 2010
    Posts
    57

    Re: Light

    thinking about designs and water flow. Would having flow enter the pipe in the middle effect flow distrubution much?

  8. #28

    Join Date
    Dec 2009
    Posts
    115

    Re: Light

    Yes, It would have an impact. Obviously you'd have two seperate screens seperated by 2-3 inches(due to the "T" piece). I don't know for sure if it would be helpful or makes matters worse to be honest tho.

  9. #29

    Join Date
    Dec 2009
    Location
    Union City, CA, USA
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    441

    Re: Light

    Better would be to have water enter from both ends.
    Same benefits, with no "T" in the middle.
    Also, dual pipes can be smaller.
    Of course, more pipes, and things to disconnect for cleaning.

  10. #30

    Join Date
    Dec 2009
    Posts
    115

    Re: Light

    Interesting idea. water in both ends. Have you tried this/seen the results rygh?

    If I can use roughly the same wattage per sq inch and use just warmwhite I could light a 10x15 vertical double sided scrubber for $100 "heatsink" and all using my favorite 1w LED's. My patented square aluminum with a fan blowing thru the tube. I can get two 42" 3" square aluminum tubes 1/8" wall thickness off ebay for $36. 80mm fans are a perfect fit, one per side. It would do the job. My tank has a couple 4 foot aluminum tubes with 50 1w LED's on each. The tube is 1" sq 4ft long 1/16 wall thickness with a 40mm fan strapped to it drawing air thru it.

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