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Thread: DIY LED plant light project

  1. #25
    Av8tor1's Avatar
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    Cool, wasnt aware of that..... my order still says "in progress" so maybe it will appear soon.

    Edit: I dont know if it is listed in their webpage index yet, but found a direct link to it using my logon and acct info

    http://www.luxeonstar.com/Predfined-...-03-000129.htm
    Last edited by Av8tor1; 10-15-2012 at 07:30 AM. Reason: add direct link

  2. #26
    God must have an interesting sense of humor Wesley's Avatar
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    Wow, it's good to get back on the forums after a long break and see how we've progressed to LED lighting in the CP world. Now, to the meat and potatoes. I agree that LEDs have great potential. The problem is that there has been little REAL development in them for use with plants. Yes, the ones ya'll have mentioned are more or less in the right direction, there is still much left to be desired. This is the exact thing I am researching for my Master's thesis so we are doing a lot of experimental work with LEDs. The problems with the high output lights is that passive cooling has not been adequate for cooling unless using a pretty significant heat sink. It would also be worth noting that LEDs lose a lot of efficiency if they get hot so the heatsink is particularly important. Even the ones in our greenhouses have lost some of their "gusto" from the summer heat.

    Ya'll have touched on this, but I'm gonna jump a little further on this; the nice thing about LEDs (and sometimes a problem too) is that they are manufactured at a very specific wavelength. So you gotta get pretty specific when choosing colors.

    I have found that dimmers are an absolute must. Since LEDs do fade and lose power over time it's important to be able to get adequate light early on at a lower setting and then bump things up as necessary. We try to give our plants ~100PAR and as noted ours lost some power over the summer from the heat and I had to go in and adjust the dimmers to get my PAR back up.

    I'd be very interested to see pics of anyone's setup and get some technical specs if anyone wants to share. I love this kinda stuff... which is why it's my field of research... LOL

    Finally, there are some LEDs that have been specifically tailored to plants. Phillips has their GreenPower lights that I am specifically working with http://www.ecat.lighting.philips.com...re/20556/cat/#. There is also Orbitech http://orbitec.com/store/led_lighting.html. These are the ones we are currently working with. There are other companies out there, but it's important to note that a lot them are making some pretty wild claims based on little no research. I would know, because I'm one of the ones doing that research.
    ~Wes~

    My plants are going green to save the environment

    My Growlist

  3. #27
    Av8tor1's Avatar
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    Hey Wesley,

    Excellent input :-)

    Im very familiar with the orbitec product line, just way out of my price range....

    Here is some early, informal playing around with high CRI White LED's from a couple years ago...
    (I want LED's that grow plants well but dont look like "typical" LED plant lights)
    http://www.terraforums.com/forums/sh...t=white+luxeon

    We just a few good ol' Cp'ers playing around with the new technologies ;-)
    FWIW I do use active cooling

    Butch
    Last edited by Av8tor1; 10-15-2012 at 11:36 AM.

  4. #28
    sarracenia_X's Avatar
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    where do you get these philips lights?http://www.ecat.lighting.philips.com...re/20556/cat/#


    how much are they? are they more expensive then DIY or less?

  5. #29
    mobile's Avatar
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    Wesley,

    I have stated before that I have not had much success with white only LEDs as grow lights. What colour combinations are you working with and are you using them as the sole light source, supplementary or both?

    The red¦blue¦red¦white LED grow light I use is 12W (12 x 1W LEDs) and has forced air cooling. My U. campbelliana grows like a weed under it.

  6. #30
    mobile's Avatar
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    I don't know the USA price but the Philips Greenpower LED Flowering Lamp are available in the UK for ~£47 GBP ($75 USD).

    UPDATE: I found a USA vendor for this lamp and they sell it at $68.89. I don't know if I am allowed to post links on this forum though.
    Last edited by mobile; 10-15-2012 at 12:36 PM.

  7. #31
    Av8tor1's Avatar
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    I think its ok,
    I found one really quick using google
    http://www.hortamericas.com/horticul...ed-grow-lights

    Id like more technical data to look over if you can provide anything....
    Wavelengths, secondary optics, distances, power levels, design criterias other than photosynthesis, etc etc etc :-)

    are the philips units the ones you mentioned that are already suffering from thermal degradation?
    Last edited by Av8tor1; 10-15-2012 at 01:47 PM.

  8. #32
    mobile's Avatar
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    Quote Originally Posted by Av8tor1 View Post
    I think its ok,
    I found one really quick using google
    http://www.hortamericas.com/horticul...ed-grow-lights
    Same one as I found.

    UK vendor here: http://www.trilight.co.uk/grow-light/philips-greenpower

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