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Thread: Varying light frequencies with LEDs

  1. #1
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    Varying light frequencies with LEDs

    Since I grow in an apartment, I have long wanted to find a way to expose my plants to varying frequencies of light throughout the day, instead of the typical pitch-black to blindingly-bright (and vice versa) photo period that comes with supplemental lighting. For this reason, I recently received a custom made, waterproof SMD 5050 red/blue 2:1 LED strip from a well known nursery in Germany, which I stripped and spliced to run on a standard 12vdc 60w laptop power supply. The idea is to allow the predominately red LED strips to come on two hours before the high output T5s and to turn off two hours later, with some overlap in between. Theoretically, this should allow the plants a chance to ease in and out of the various "cycles."




    LEDs only:


    LEDs on, T5s off.


    LEDs on, T5s off.


    LEDs on, T5s off.



    with T5s


    LEDs and T5s on.


    LEDs and T5s on.



    Will provide updates on plant performance in the future...



    edit: Turns out the package was labelled incorrectly and these are SMD 5050.
    Last edited by mato; 03-07-2013 at 09:28 AM.

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    very cool!

    i am skeptical that plants care very much about how quickly their photoperiod based day starts but could very well turn out to be a factor. regardless, the LEDs will surely help supplement spectrum-specific light to your rack

    cheers

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    mass's Avatar
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    I'm amazed with this: http://farm9.staticflickr.com/8370/8...e3144d19_c.jpg
    Always wanted a scene like that here, but just can't seem to pull it off.

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    LED is the new light of the plant industry future. You all have to give it a try. and when your really start getting into fancy setups, you see extreme growth and reaction. I deal with this company and have seen extreme growth in both planted and marine aquaria. I grow mangroves at the shop with these lights.http://www.aquaillumination.com/

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    RobinGordon's Avatar
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    Long and short wave red lights are very important for plant biochemistry - many seasonal plants will not germinate unless the final/first light of the day is in the correct wavelength region.
    Last edited by RobinGordon; 03-06-2013 at 11:44 PM. Reason: poor grammar

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    Here are the actual lights:


    LEDs


    LEDs


    LEDs

  7. #7
    Sundrew's Avatar
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    This setup is awesome! Can someone explain exactly why it's better to "ease" the plants into the light?

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    Great looking setup! I was also looking into supplementing with LEDs so I will be paying close attention to this thread. Kessil is the brand I'm looking into to get more of the red spectrum.

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