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Movie Pimp
Antiprohibitionist
Joined: 01 Nov 2007
Posts: 28
Location: Police State of America
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 Posted: Mon Mar 17, 2008 11:18 pm Post subject: LED experience |
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Has anyone here tried to grow with LEDs? I am familiar with a couple of grows chronicled on other sites. A good one is.
http://www.greenpinelane.com/hgl_procyon_test.aspx
This guy is testing a new high-power LED growlight and seems to have good results with his tomater plants, so far. Would a light like this work better than a bunch of T5 flouros? I am interested only in these two setups. |
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Mr.C
Do You Wanna Get High
Joined: 15 Jan 2008
Posts: 580
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| Posted: Tue Mar 18, 2008 8:04 pm Post subject: |
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i have only seen the videos on youtube,,but very interesting,,i think the lights have to be RIGHT ON TOP of the plants though dont they,,and i wonder myself if the yield is very large with LED lights.
it is pretty cool though from what i seen. |
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FZRaven
Activist
Joined: 07 Aug 2007
Posts: 285
Location: Vermont
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| Posted: Thu Mar 20, 2008 7:23 pm Post subject: |
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I've thought of growing with LED's, if I ever decided to grow I probable will. I have a lot of idea's on this, as I work with LED's all day long.
See the key is to get the right light, 660nm (nano meter) is red, 470nm is blue. You want a mix of both lights, in fact you probable don't even want 470nm or 660nm. It would be best to find out exactly what spectrum of light a cannabis plant needs.
So I might as well tell you my grand idea for LED lights.
Were I work we make a controller to control LED lights that we build. These controllers have a strobe function, now I know that plants don't absorb light all the time 24/7. They absorb it then stop then absorb more, it's not a very long stop you would measure it in milliseconds or less. So what I want to do is build a massive LED grow light and hook it up to this controller. With a little experimenting in my "Lab" I should be able to find the right strobe speed.
Now there are a few good things about strobe lights instead of constant lights. First and foremost your going to save some power, but your not going to save half. The reason your not going to save half is because when you strobe a LED you can push more power through it. A typical LED uses 30ma, if you strobe it you can feed it much more. So you get brighter light, and with the strobe your plant is getting this light at exactly the right time.
Also if you make a your grow light RGB (Red,Green,Blue) and wire each channel by itself you can "fine tune" the light. With an RGB light you can tune the light to produce just the right light. And the best part is you can change it for when vegging or flowering. So one light would do everything, and you wouldn't even need to change a bulb, just click a button. Another great thing is that you can program turn on and off times right in the controller software, it's perfect. |
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Brute4291
Mod-er-rater?
Joined: 01 Dec 2007
Posts: 573
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| Posted: Thu Mar 20, 2008 9:46 pm Post subject: |
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| Fz, have you tried 420nm, I've heard something about 420 being a number in the light spectrum and cannabinoids absorb it the best. I'm not sure if this is true or not. |
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FZRaven
Activist
Joined: 07 Aug 2007
Posts: 285
Location: Vermont
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| Posted: Thu Mar 20, 2008 10:16 pm Post subject: |
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| Brute4291 wrote: | | Fz, have you tried 420nm, I've heard something about 420 being a number in the light spectrum and cannabinoids absorb it the best. I'm not sure if this is true or not. |
Well for only spending a short time this is what I found.
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for good growing you need blue, red and deep red spectrum. for clorophile A you need 400-430nm of blue and 650-670 nm of red. for clorophile B you need 420-470 nm of blue and 620-650 nm of red.
peak absorbtions are at A: 425 and 660 nm, and at B: 450 and 630.
the power of spectrum should be stronger in red spectrum (arround 85-90%), others arround 5% of each. i did some test grows, but i only used 470 and 630 spectrum and the plants looked just fine. if you give them all the spectrum (for A and B type), they will grow even better.
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Movie Pimp
Antiprohibitionist
Joined: 01 Nov 2007
Posts: 28
Location: Police State of America
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| Posted: Sun Mar 23, 2008 4:38 pm Post subject: |
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| Interesting idea with the strobe lights, Raven. Now you can't forget the techno music if you got strobes. Thanks for your knowledge. |
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Vince
Antiprohibitionist
Joined: 23 Apr 2008
Posts: 35
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| Posted: Wed Apr 23, 2008 6:14 pm Post subject: |
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| I got one coming soon can't wait! I'll let ya know how it works. [/img] |
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Brute4291
Mod-er-rater?
Joined: 01 Dec 2007
Posts: 573
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| Posted: Sun May 04, 2008 8:40 pm Post subject: |
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| Well there was a link posted to a video of a guy using an LED for veg growth, and a high pressure sodium to flower the plants. |
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TheDeanOfGreen
Antiprohibitionist
Joined: 18 Jul 2008
Posts: 87
Location: Dean's Mansion
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| Posted: Sat Jul 26, 2008 2:43 pm Post subject: |
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I'm looking into using LEDs for my indoor grow, and I've got some good info to share.
First, plants use specific wavelengths of light for growth and for flowering. Here is a chart that shows light spectrum vs absorbtion:
http://img.photobucket.com/albums/v710/lkdj2003/chart.jpg
The left side "hump" in the graph is in the blue spectrum (close to 420, coincidence?  ) and it promotes growth. The left most hump is in the red spectrum, and it promotes flowering.
LED Lights that you find on ebay, (for example: http://stores.ebay.com/ledwholesalers_LED-Grow-Light_W0QQcolZ4QQdirZ1QQfsubZ21143269QQftidZ2QQtZkm) only come in blue or red.
LED lights, individually, aren't as powerful as a single HPS or MH bulb, therefore the panels are made up of hundreds of LEDs but are equivalent to only 30 or 40 watt.
Pros to LED:
Almost no heat
Uses little electricity
Emits wavelength specific light
90% of light emitted is absorbed
Cons:
Come in large panels
Expensive ($250 for 400w equivalency) |
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TheDeanOfGreen
Antiprohibitionist
Joined: 18 Jul 2008
Posts: 87
Location: Dean's Mansion
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| Posted: Tue Aug 05, 2008 9:20 pm Post subject: |
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Here is a good website for LEDs:
http://www.gro-tek.com/index.html
This site has a ton of info and pretty pictures (good if your stoned  ) and has reasonable prices. I've bought a hybrid red/blue LED panel and I can't wait to see how the ladies love it. |
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socrateez
Cannabis Castaway
Joined: 01 Feb 2008
Posts: 1135
Location: Sittin in a cave, high as hell......
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| Posted: Tue Aug 05, 2008 11:34 pm Post subject: |
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I think the microcontroller idea has genuine merit at least to improve efficiency. Now for spectra tuning, thats a novel idea.
The site in the above post has some issues. The most obvious to a non-grower being:
How is the plant going to absorb the multiple spectra emitted when they spot individually on the plant like this photo? Blue in the middle red on the outside. Doesnt seem to provide very even coverage of spectra or intensity over the plant surface.
This graph is definitely doctored. Anyone familiar with statistically plotted curves know that the blue and red lines plotted are natural and the others are fictional and drawn shitty at that. You can even tell it was drawn by a right handed person or mouse. [/url]
Beware of scams regarding emergent technology.
Google free energy if you want to see an abundance of technical nonsense and scams. |
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