Making LEDs as good as halides

Discussion in 'LED Aquarium Lighting' started by needmorecowbell, Jun 3, 2012.

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  1. needmorecowbell

    needmorecowbell Torch Coral

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    After looking around the web for something that would show me what diodes I would need for my corals to thrive under LEDs, I came up blank. I decided to make my own. I thought, if halides have worked for this long, why not make LEDs as close as possible in likeness to them? I wanted all the pros of halide with all the pros of led.

    With that said, this is how I went about doing it. I searched sanjay from Michiganreefer's thread for a spectroscopy of a good 20k 250w fixture which is shown below. I used that information against the spectroscopies of some LEDs, mainly royal blue and cool white, the diodes that almost all units have. I found that we are missing some parts of the spectrum, which might be why we aren't getting all the results we would like. We are missing the 390nm-420nm range, the 540nm-550nm range, and the 680nm-690nm range. These colors are violet, green, cyan, and red. The only problem is that the red isn't obtainable in the aquarium industry to my knowledge. It is called deep red, and is used in plant keeping. The main ones to worry about are cyan and violet, because that is where we miss the most. Then green and red, but in much less intensity.

    Right now i have a 120w dimmable led unit with royal blues and cool whites. I will be making a DIY strip that will have cyan and uv on it over the summer, and will post back with results. I will be adding a small amount of red and green to the mixture at a later time.
    Questions, comments, constructive critisism are welcome.

    Heres the pics.. ImageUploadedByTapatalk1338777900.880012.jpg ImageUploadedByTapatalk1338777911.757990.jpg ImageUploadedByTapatalk1338777920.210131.jpg
     
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  3. 1.0reef

    1.0reef Giant Squid

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    I think led group buy has some uncommon LED's.
     
  4. needmorecowbell

    needmorecowbell Torch Coral

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    ** Sorry meant far red LEDs, not deep red**

    I've checked, the deep red that they sell isn't even close to the 680nm that we need. It's much lower.

    Also, thanks to biocube and others for helping me out in previous threads on this subject.
     
  5. Biocube

    Biocube Giant Squid

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    Here's Rapids Red LED, its 660nm.

    Solderless Osram Red LED - Rapid LED


    660nm wavelength
    1000mA max. drive current
    2.15V @400mA
    No secondary lenses are available on this item
     
  6. needmorecowbell

    needmorecowbell Torch Coral

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    Yep, but would 20nm be too much of a difference?
     
  7. Biocube

    Biocube Giant Squid

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    I don't think so.. I don't really think Red is necessary in general. I took advice from Rapid and kept red out of my LED build.

    I hate to be a debby downer on this but id stick with Cyan/UV at the moment and wait for LEDs to catch up, then add Red and other colors of your liking.
     
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  9. needmorecowbell

    needmorecowbell Torch Coral

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    I agree, according to the spectroscopy, the bumps in those two ranges are minimal, I'm sure in the future there will be something perfect for this. Once more people start learning about them I guess.