LED lights?

Discussion in 'Advanced Techniques' started by budd, Nov 15, 2004.

  1. budd

    budd Registered

    Does anyone know anything about using LEDs in indoorgrowing? Would ease the heat problem and save energy? What should the wavelength be? How many lux is needed? :confused: Has anyone ever tried it?
  2. Imotep

    Imotep Registered+

    one day someday.
    from what ive seen theyre not as good as is needed yet or cheap enough.
    LEDs will be a force in the future though.
  3. DR. Science

    DR. Science Registered


    I know there is a guy doing a test at overgrow, i think. I belive that its possible, but more research needs to be done, something Advanced nutirents should look at.
  4. DR. Science

    DR. Science Registered

    Led Lights

    this page made me say, holy shit. if you need led lights, these people have it.Sage Lights
  5. notanovice

    notanovice Registered+

    dont bother
  6. DR. Science

    DR. Science Registered

    Listen notanovice, I don't think you can just come and say that people should just not bother. Who the hell are you? Science and knoledge are the product of misfits going beyond the confines of custom and habit to increase the possible. Those who are complacent and apathetic, who wish to do things only as they have been done before, will inevitably get the same results as everyone else. Only those who will take the road less traveled by will find the better methods. Shame on you notanovice, go find a cave to hide in with your dogmatic stupidity. And to all those who veture into unknown territory, I thank you, and so to will humanity.
  7. notanovice

    notanovice Registered+

    if you want to use l.e.d. go ahead, who am i to stop you.
    if you got the cash, do what you want.
    until i have tested and proven that l.e.d.`s are BETTER to use, and more econimical to use, then i will stick with what i know NOW, but until then.
    also i would like to ask you , who are you to judge me?
    i did not tell you or make you read this, just because you have interest in the sale of l.e.d.S and you have a DR. infront of your screen name, doesnt give you the right to judge and attack me in the way that you have. :( :( :(
  8. notanovice

    notanovice Registered+

    DR. science

    thunder bay aye hoser??
  9. DR. Science

    DR. Science Registered

    I apologise

    If i have painted into a corner in which you do not belong, I regret horibly for having insulted you. That is, if you agree with my comments, with regard to the production of knoledge and the advancement of science, then we have no issue.I thank you for your dialogue.

  10. DR. Science

    DR. Science Registered

  11. notanovice

    notanovice Registered+

    thanx for the site

    thank you for the inovative imformation. i did not mean to say, never bother, it was meant to be, dont bother til imformation is available to back up the economical, and heat, and usefulness of L.E.D.`s. for i am one of those who have tried everyway known to propagate and grow. i am one who welcomes new ways. my mind is open, and i learn new things everyday.

    i am originally from southern ontario
    between chatham and tilbury
    a very small town called Merlin
    take care and have a great day
  12. DR. Science

    DR. Science Registered

    Led-Uvb experiment

    I'm currently in contact with a distributor of Led lights. I have a project in the planing phase to grow plants using wavelength specific lights to ensure that maxmum energy is be transformed from electrical energy to useful light energy to the pant, and, ultimately, by easing the growth of the plant by using advanced hydroponics techniques, to usable energy to the plant cells. I will report on my progress as it develops.
  13. notanovice

    notanovice Registered+


    i am very interested in those findings.
    please keep us posted
  14. sy9942

    sy9942 Registered

    If you've got an account on overgrow you might recognize my username. I'm one of the first people who gave LEDs a shot, and I must say that for 99.999% of people, it's a waste of time. I'm not trying to be a pessimist, I'm just... Well, here, let's simply put it in perspective.

    Do you take a HPS lamp and plug it directly into the wall? No, you don't, you plug it into a piece of fancy electronic equipment called a Ballast. Well, similarly with LEDs, connecting them directly to a power source without any driver circuitry will not get you the kind of plant growth you're looking for.

    So the key problem is the ballast. Ballasts for LED lighting of plants don't actually exist, so you have to build one. This is why for 99.999% of people, it's a waste of time. You need to be an armchair electrical engineer in order to throw together something that will give you results.

    If you want to build your own ballast (pulsed DC, PWM), here are my suggestions:
    - variable frequency from 2kHz to 20kHz (honestly, a set 20kHz would be fine)
    - variable pulse width from 1% to 10% (this is required, as hopefully you'll have the ballast long enough that you'll be able to use it with different types of LEDs, which may have different tolerances to high current pulsing. Being able to back down the pulse width will keep you from frying your LEDs)
    - selectable constant current in multiples of 20 mA, from 20mA to 500mA.
    - multiple "channels" which can have their pulse width and frequency adjusted independently.
    - A very accessible on/off switch, just in case.

    The best way that I've encountered to do this type of thing is by basing it around a PIC microcontroller. The easiest of course is the PICAXE ( www.picaxe.co.uk ) which can be programmed in BASIC and doesn't require special programming hardware to use. You use the microcontroller to take care of frequency and pulse width, you use JFET transistors configured as current regulators (see here) in order to handle current regulation.

    So if you're the EE type, by all means. Get some 730nm, 660nm and 430nm LEDs and get crackin' on that ballast. (note: 470nm and 640nm could be added as well)
  15. Shadow Smoke

    Shadow Smoke Registered+


    i wander how many freggn les you would need! i might give it a shot with some other kind of plant maybe a pea plant. but thats gonna have to wait till i have money :(
  16. Shadow Smoke

    Shadow Smoke Registered+


    hey i got an idea from this post and looked into it

    ITS ALREADY BEEN DONE!! you can grow plants with LEDs!

    problum is that inorder to grow a very small -plant you need about 300 lights riged up in a very small area so its not yet practical.

    BUT i think maybe with the advancement in fiber optic tec. and the use of sound waves it might be possible to grow useing less power than it takes to run a wrist watch!

    most of this info is hear say.. but just think about that for a while maybe some day we can grow more plants in less space than ever before : )

    but yes you can grow a healty plant with LED!
  17. stra8outtaWeed

    stra8outtaWeed Registered+

    here are my leds and i get great production!! took me a while to find a light i was happy with but i do everything fromm clone to finish under LED's :smokin:

    Attached Files:

    • 035.JPG
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    • 003.JPG
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  18. jakester

    jakester Registered+

    Yeah, that conversation was from 2004. I doubt you will have to do much convincing around here nowadays!

    Nice grow!
  19. stra8outtaWeed

    stra8outtaWeed Registered+

    thanks :jointsmile:

    i did not look at the date....ooops! been awhile since i have been on a grow forum...gotta retrain!

  20. GodBud

    GodBud Registered+


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