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Thread: DIY LED plant light project

  1. #17
    mobile's Avatar
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    Could debate this all night

    I'm not disagreeing that accessory wavelength are of use, but one must be careful that they do not become the primary ones when selecting a grow light. I will do a little more research regards the green wavelength, but the fact that most plants are green indicates that they reflect that colour.

    A good compromise, which be both appear to agree on, is to use blue and red LEDs, with accessory wavelengths provided by white. I have a personal preference to 660nm reds over 630nm, as most of the chlorophyll absorption charts I have seen peak at 660/662nm.

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    some of these look good. can i just use white instead of having to add red and blue, if i were to use a combination of cool,, neutral, and warm whites?

    also, would i be able to attatch them using screws to the predrilled heatsinks from RapidLED, or are they a different size? the stars look the same as the ones on RapidLED

    http://www.luxeonstar.com/ANSI-White...tars-s/348.htm

    http://www.luxeonstar.com/ANSI-White...LEDs-s/394.htm

    what about getting multiple colors of LED on a single star like these, for beter color blendng? are these the same size as a normal star, or are these bigger, to fit more diodes on them? i would have to get a lot of fans and cooling stuff for these, right? i am assuming that they need more cooling due to the fact that there are three diodes in close proximity to each other, so there is twice the heat, correct? i cold get a couple extra fans if needed.

    http://www.luxeonstar.com/Predefined...lies-s/446.htm

    http://www.luxeonstar.com/Any-3-Rebe...-03-custom.htm

  3. #19
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    Quote Originally Posted by mobile View Post
    Could debate this all night

    I'm not disagreeing that accessory wavelength are of use, but one must be careful that they do not become the primary ones when selecting a grow light. I will do a little more research regards the green wavelength, but the fact that most plants are green indicates that they reflect that colour.

    A good compromise, which be both appear to agree on, is to use blue and red LEDs, with accessory wavelengths provided by white. I have a personal preference to 660nm reds over 630nm, as most of the chlorophyll absorption charts I have seen peak at 660/662nm.
    I agree Carl, on both points......... and honestly, I doubt the green would matter much in sarra's application. However, for larger nep type applications where canopy penetration might be more critical..

    Quote Originally Posted by sarracenia_X View Post
    some of these look good. can i just use white instead of having to add red and blue, if i were to use a combination of cool,, neutral, and warm whites?

    also, would i be able to attatch them using screws to the predrilled heatsinks from RapidLED, or are they a different size? the stars look the same as the ones on RapidLED

    http://www.luxeonstar.com/ANSI-White...tars-s/348.htm

    http://www.luxeonstar.com/ANSI-White...LEDs-s/394.htm

    what about getting multiple colors of LED on a single star like these, for beter color blendng? are these the same size as a normal star, or are these bigger, to fit more diodes on them? i would have to get a lot of fans and cooling stuff for these, right? i am assuming that they need more cooling due to the fact that there are three diodes in close proximity to each other, so there is twice the heat, correct? i cold get a couple extra fans if needed.

    http://www.luxeonstar.com/Predefined...lies-s/446.htm

    http://www.luxeonstar.com/Any-3-Rebe...-03-custom.htm
    Sarra...

    Can white along grow plants.... yes,
    Can they be enhanced with addtional blue and red, again most definitely yes,
    (Even when I select fluorescent bulbs, I still look at their spectral curves for red and blue performance)

    Will more LED's on a single star produce more heat... oh yes, absolutely

    Will multiple colors on one star improve color blending.... yes

    Twice the heat?.... for some reason Im thinking it increases exponentally, but I cant remember why.

    I used a heatsink paste that was also an adhesive.... but that is probably old school technology by now.

    You're on your own now mate

  4. #20
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    Couldn't resist.... dang

    Custom Tristar:
    SR-03-CUSTOM Your Choice Of Any 3 Rebel LEDs Soldered To A 20mm Tri-Star CoolBase
    [LED 1: 5000K ANSI White - 200 lm (LXW8-PW50)] (85 Cri)
    [LED 2: Deep Red - 580 mW (LXM3-PD01-0260)] (655nm)
    [LED 3: Royal-Blue - 840 mW (LXML-PR01-0425)] (447nm)

    Already have an adjustable driver/heatsink/fan from my previous trials...
    Well at least you know what "I" would order... LOL



  5. #21
    mobile's Avatar
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    Av, Looks interesting. Personally I would go for a warmer white, but the combination of white, red and blue on a single tri-star looks interesting. Did you get a price?

  6. #22
    mobile's Avatar
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    Just found them on Luxeon Star website. Interesting to see that once the initial custom mounting fee is paid then they are added to the pre-defined list, where anyone can order them.

    They also do quads. Might be interesting to try a white, blue, red, orange combination, as that's what I currently have in my LED growlight.

  7. #23
    Av8tor1's Avatar
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    Carl,

    I would have to check the email, but I think the Tri-star was 21-ish USD, but being a custom build there was a 25 USD assembly fee
    Probably should have done it myself, my soldering skills are pretty good.. but oh well, this way I know there is no thermal damage.

    Im anxious to see how it performs
    Butch

  8. #24
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    If you have already paid the mounting fee, then your selection should now appear in pre-defined list for others to purchase, minus the one time fee.

    A one time custom mounting fee will be applied to each different custom tri-star LED assembly that you order.

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