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  #11    
Old 08-29-2007, 12:42 AM
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What I would like to know is about the collection of energy in solar panels, and if a set up with an LED light modified to the green spectrum can maintain a mother plant with Sunlight and the LED solar discharge, in the green spectrum with plenty of Mylar, without letting that mother plant flower.
Basically, can you fool the light cycle with enegry given out of an inexpensive solar set up, if you maintain the maxium hours of sunlight for a vegatative plant?
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  #12    
Old 08-29-2007, 12:48 AM
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Quote:
Originally Posted by potlike View Post
I have an educational background in economics and statistics; so if anyone had any theories they would like to test on ways we can improve various aspects of our growing I would be willing to work with you and intrepret data on a scientifically sound level so we could setup experiments in whatever theory it may be.

Could be nutrient vs nutrient efficiency, EXACT optimal lumens for given strain, trichome development.... you name it - I can interpret the data to laymen terms in exact percentages of efficiency etc etc.

-pot
I really really agree with your main goals. This site is used far too much to bash the same issues over and over again. When most of the time, all the questions can be found easier and faster in the GrowFAQ.

The main members do not spend enough time working on ways to increase things like strain strength, cost reduction, yield, or other main goals that we as growers need to help advance our science

It's really nice that we have you as a member now, that has the motivation and the mind to help advance us semi-seasoned growers. Good luck!

Dustin
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  #13    
Old 08-29-2007, 12:57 AM
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well like I said sunny I do not have the resources to run these experiments by myself I am just interpreting the results for you in real understandable terms based on sample or population evidence.

if you want to do this test give me some raw data to interpret on the subject or do the experiment yourself and give me the data at that point.


-pot
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  #14    
Old 08-29-2007, 09:34 AM
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This is a pretty cool idea. When i first went through your calculations i was almost positive you did something wrong. the line " 6x13x12=936 watts per day" threw me off because that would be an estimate for running those 6 cfls for 12 sec not 12 hours. then it hit me, you're doing it in w-h not watts and then divide by kwh and not kw. thank you for making me over think this problem.
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  #15    
Old 08-29-2007, 10:35 AM
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Quote:
Originally Posted by potlike View Post
CFL:

6x13x12=936 watts per day

6 weeks * 7 days a week = 42 days

936*42=39312 watts per growing period

39312/1000= 39.312 kw per growing period

39.312 x .146 = $5.73 per growing period on CFL lighting all other things equal

5.73/1.25= 4.58 per ounce in electricity

HPS
1x1000x12=12000 watts per day or 12kw per day
12kw per day x 42 days =504 kw per growing period

504 X .146 = $73.584 PER growinrg period on hps all other things equal
73.58 / 2.25 = $37.70 per ounce on hps

4.58/200 = .0229 or 2% of street cost CFL
37.70/200 = .1885 or 18% of street cost HPS

16% differential in cost


hrmm that is VERY INTERESTING

as I said I didn't do any hypothesis testing or regressions but this looks significant enough to look into
-pot
very cool thank you very much for figuring that out. like i said before i was just ball parking.
the link i posted in my first post on this thread was a head to head grow i did a while back just for shits and giggles. i was trying to see if floros or CFLs could really keep up with a HPS as far as being cost effective, and what the pros and cons are for each. alot of the newer growers try to use floros or not enough CFLs and have probs, so i thought i would put myself in their shoes.
to see what all probs i would run into. i had an extra HPS so i tossed it in to show the differences in useing floros and HID lighting. mostly just to have a better feel for what im talking about.
everything was ran exactly the same and i do mean everything. the same totes, nutes, clones, room temp, res temp, size rooms, ph, ppm, and same additives added at the same time. the lights were the only thing that was different.
i was going to do a head to head where 1000watts of HPS would grow side by side with 1000watts of CFLs, but i desided not to do it after i built the cabnet. it wouldve been way to much work to move 40 x 26watt CFLs everyday.
and about what you said about needing enough CFLs to have 140,000 lumans to grow next to a HPS,,,, you really wouldnt need that many to do it. you lose something like 1/2 your luman power per foot. they did a write up on this on OG. so a 140,000 luman HPS light hanging 1 foot over the plant will only have 70,000 lumans hittin the plants. and 1 foot is really honkin close for a 1000watt HPS. the CFLs are no more than 2 or 3 inches away, so more of the lumans per watt reach the plants.
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  #16    
Old 08-29-2007, 03:33 PM
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to determine how many lumens your plants are getting it's :

L/(d^2) = Lumen/(distance squared)

then to figure out lumens per watt that your plants are getting it would be:

L/((d^2)*w)

it'd be really cool if we could collect a whole bunch of data to plot out the efficiencies of lights. i'd be more than glad to help you out potlike if you need/want it.
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  #17    
Old 08-30-2007, 12:47 AM
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Something like that was done 10 years ago, on the original forum. We named it the Yield-O-Rama. Growers would submit specific info about their crops, and it has been compiled. See it here:

Indoor Yield-O-Rama - Home Page


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  #18    
Old 08-30-2007, 01:00 AM
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Quote:
Originally Posted by dustimus View Post
I really really agree with your main goals. This site is used far too much to bash the same issues over and over again. When most of the time, all the questions can be found easier and faster in the GrowFAQ.

The main members do not spend enough time working on ways to increase things like strain strength, cost reduction, yield, or other main goals that we as growers need to help advance our science

It's really nice that we have you as a member now, that has the motivation and the mind to help advance us semi-seasoned growers. Good luck!

Dustin

you obviously haven't seen any of my posts.
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  #19    
Old 08-30-2007, 07:56 AM
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what makes trichomes production? How can we induce the plant to produce more tri?
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  #20    
Old 08-30-2007, 08:10 AM
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people, it's all genetics. you can't make a short man tall. but he can marry a tall chick and have tall babies.
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