PSUAGRO.
Well-Known Member
12/12 from seed......will know by day 45-50 that it doesn't work at all if they don't flower
Using fems right?
Constant light in a room without reds for 12 hours...
- Thread starter vladimiroslav
- Start date
Using fems right?
Chronikool
Well-Known Member
Yeah...3 plants....2 strainz....1 ounce... 
stardustsailor
Well-Known Member
Subbed !
Cheers and good luck !
Cheers and good luck !
PSUAGRO.
Well-Known Member
Really excited to see this unfold chroni!Yeah...3 plants....2 strainz....1 ounce...
You may become a mj pioneer if this shit works.......or not if it fails
Chronikool
Well-Known Member
If it worx...I think credit goes to Vladimiroslav...(bought to the attention of the community) cant credit me for turning a few switches....Really excited to see this unfold chroni!
You may become a mj pioneer if this shit works.......or not if it fails
And if it doesnt work....well at least i'll have some lovely vegged party cup plants to cheat with in the next party comp....
PSUAGRO.
Well-Known Member
That's true, you would be unbeatableIf it worx...I think credit goes to Vladimiroslav...(bought to the attention of the community) cant credit me for turning a few switches....
And if it doesnt work....well at least i'll have some lovely vegged party cup plants to cheat with in the next party comp....
Make sure you double/triple check the timer situation.......and good luck
stardustsailor
Well-Known Member
I was searching for some other things and I came across this ...
It provides some 'strange ' info ....
4.3
Effects of LED on crop development
In the study with LED lighting (Paper VI), plant development was strongly affected by the different treatments.
For the growth chamber experiments,plants were strongly elongated in the yellow, red and green light, whereas
growth was more normal in the blue and white light. For all treatments,plants remained in the vegetative
state throughout the experiment.
In the photoperiodic light experiment, the length of the main shoot was significantly increased by the blue light for both Chrysanthemum and Euphorbia. Yellow, red and green light resulted in lower total plant height compared with white or blue light. InEuphorbia, the fresh and dry weight was higher in the blue light than for all other treatments.
Flower initiation was completely prevented by the white,yellow, green and red light, but for
the blue light flower buds emerged when the light intensity was below 10μmol s-1m-2. The white LEDs were the most effective in converting electricity (w) into light (μmol m-2s-1PAR), which makes them most suitable for photoperiodic lighting.
Our expectations of reduced shoot elongation by the blue light, as has been suggested by several authors
(Ménardet al., 2006; Shimizu, 2006; Shimizuet al., 2005; Rajapakse &Kelly, 1992; Appelgren, 1991), were not confirmed in these studies.
One major difference in our study compared with previous studies was the use of
LED technology instead of spectral filters.It has been suggested that spectral filters allow pollution with other spectral bands than the intended (Parkeretal., 1946), whereas the LED technology emits a sharp peak at the intended wavelength. Such cross-pollution has also been demonstrated for fluorescent tubes with spectral filters (Appelgren, 1991).
Instead, for the chosen cultivation method, yellow light seemed to be of
interest for keeping stem elongation low,which is often desired in pot plant cultivation (Löfkvist, 2010).
The measured air temperature for all treatments was within the ±0.35°C range of accuracy stated by the logger manufacturer(Fig. 4). Total dry weight was lower for Chrysanthemum in the treatment
with LED for supplementary light compared with HPS lamps. Total plant height for
Kalanchoë was lower in the LED treatment due to less elongated flower stalks. For
Euphorbia, internodal length as well as stem diameter and number of cyathia were lower for LED-treated plants, whereas the numberof bracts was higher (p<0.05).
LED-treated Kalanchoë reached anthesis three days later than HPS-treated plants,
probably due to lower leaf temperature, as leaf temperature was around 1°C lower for LED-treated plants.
http://pub.epsilon.slu.se/2408/1/Bergstrand_KJ__101116.pdf
Well....
Hmm...
It provides some 'strange ' info ....
4.3
Effects of LED on crop development
In the study with LED lighting (Paper VI), plant development was strongly affected by the different treatments.
For the growth chamber experiments,plants were strongly elongated in the yellow, red and green light, whereas
growth was more normal in the blue and white light. For all treatments,plants remained in the vegetative
state throughout the experiment.
In the photoperiodic light experiment, the length of the main shoot was significantly increased by the blue light for both Chrysanthemum and Euphorbia. Yellow, red and green light resulted in lower total plant height compared with white or blue light. InEuphorbia, the fresh and dry weight was higher in the blue light than for all other treatments.
Flower initiation was completely prevented by the white,yellow, green and red light, but for
the blue light flower buds emerged when the light intensity was below 10μmol s-1m-2. The white LEDs were the most effective in converting electricity (w) into light (μmol m-2s-1PAR), which makes them most suitable for photoperiodic lighting.
Our expectations of reduced shoot elongation by the blue light, as has been suggested by several authors
(Ménardet al., 2006; Shimizu, 2006; Shimizuet al., 2005; Rajapakse &Kelly, 1992; Appelgren, 1991), were not confirmed in these studies.
One major difference in our study compared with previous studies was the use of
LED technology instead of spectral filters.It has been suggested that spectral filters allow pollution with other spectral bands than the intended (Parkeretal., 1946), whereas the LED technology emits a sharp peak at the intended wavelength. Such cross-pollution has also been demonstrated for fluorescent tubes with spectral filters (Appelgren, 1991).
Instead, for the chosen cultivation method, yellow light seemed to be of
interest for keeping stem elongation low,which is often desired in pot plant cultivation (Löfkvist, 2010).
The measured air temperature for all treatments was within the ±0.35°C range of accuracy stated by the logger manufacturer(Fig. 4). Total dry weight was lower for Chrysanthemum in the treatment
with LED for supplementary light compared with HPS lamps. Total plant height for
Kalanchoë was lower in the LED treatment due to less elongated flower stalks. For
Euphorbia, internodal length as well as stem diameter and number of cyathia were lower for LED-treated plants, whereas the numberof bracts was higher (p<0.05).
LED-treated Kalanchoë reached anthesis three days later than HPS-treated plants,
probably due to lower leaf temperature, as leaf temperature was around 1°C lower for LED-treated plants.
http://pub.epsilon.slu.se/2408/1/Bergstrand_KJ__101116.pdf
Well....
Hmm...
stardustsailor
Well-Known Member
More from that guy ... Karl-Johan I. Bergstrand
( Faculty of Landscape planning, Horticulture and Agricultural Sciences
Department of Horticulture,Alnarp,Sweden .)
http://www.pcsierteelt.be/hosting/pcs/pcs_site.nsf/45191b4dc69a85ccc1256c25004b9e3d/fcbcffb4eedb8a58c1257c1a0041dbeb/$FILE/K-J. Bergstrand.pdf
And the best kept for the end .....
Which type of illumination has the best photosynthesis rate score ?
Come again ?
Ahhhh...
The more I search over the issue ,the more I love those Cree CXA white led chips ...
I swear ...
Cheers .
( Faculty of Landscape planning, Horticulture and Agricultural Sciences
Department of Horticulture,Alnarp,Sweden .)
http://www.pcsierteelt.be/hosting/pcs/pcs_site.nsf/45191b4dc69a85ccc1256c25004b9e3d/fcbcffb4eedb8a58c1257c1a0041dbeb/$FILE/K-J. Bergstrand.pdf
And the best kept for the end .....
Which type of illumination has the best photosynthesis rate score ?
Come again ?
Ahhhh...
The more I search over the issue ,the more I love those Cree CXA white led chips ...
I swear ...
Cheers .
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stardustsailor
Well-Known Member
So....
-High Irradiance.
-Full PAR spectrum ( +IR / UV if possible ).
- Ideal Canopy Temperature .
Small secrets for big,juicy ,potent & thick led buds .....
-High Irradiance.
-Full PAR spectrum ( +IR / UV if possible ).
- Ideal Canopy Temperature .
Small secrets for big,juicy ,potent & thick led buds .....
Greengenes707
Well-Known Member
This is interesting. I was chatting with a guy who swares that you can leave 660nm on 24 hours a day and they will flower. And that any blue over the 12hrs of normal light time will kill flowering and promote veg. He had no evidence to back it up but was very passionate about his thoughts.
I'll be watching this experiment.
I'll be watching this experiment.
Cococola36
Well-Known Member
Wow and thats the polar opposite of the debate above lol, I like to try shit but the only thing ive been doing that i know works is the far red light at lights off to add more day cycle time. But even at that i only do 13 on 11 off
Greengenes707
Well-Known Member
Exactly. So I am interested. I have no bias either way. Just an interesting thing to know/think about.
It's not my cup of tea of an experiment...but I would love to see the results.
overthinkingismything
Member
~600 umol/m2/s is looking mighty good considering the reduced operating a build costs.
Now I just need to worry about dialing in my fan speed so I can sit right around 30 C in the tent
Subbed up for this experiment.
Now I just need to worry about dialing in my fan speed so I can sit right around 30 C in the tent
Subbed up for this experiment.
FranJan
Well-Known Member
Rosenthal, FWIW http://mjgrowers.com/book_what_exper1.htm
GREEN AND BLUE LIGHT AT NIGHT
As plants evolved for hundreds of millions of years they never actually had to deal with separation of light spectrums or unusual lighting regimes. When they received light it came from the sun in a mixture of spectrums and they could pick and choose which to use. It was only with the advent first of gas and then electric lighting that plants encountered unusual regimens and splintered spectrums.
Plants measure day length using the red light spectrum. While they use other spectrums for other purposes, they are not sensitive to them as far as flowering is concerned. They are almost totally insensitive to green light and for this reason reflect it back to us while absorbing most other spectrums.
Plants’ insensitivity to green light can be used to a gardener’s advantage. You know that turning the light on in the middle of the dark cycle disturbs the plants’ flowering paradigm. The light, HPS, fluorescent and MH lamps all emit red light. Green fluorescent and LED lights contain no red light and will not disturb the dark period. You can go in the garden under adequate light to work, as long as it is green.
Plants use blue light for certain regulatory processes and also for photosynthesis. Chlorophyll absorbs both blue and red light and uses the light’s energy to power the complex process in which water and atmospheric carbon dioxide are converted to sugar and oxygen gas. Blue light does not affect the regulation of flowering.
When blue light is turned on during the dark period, plants photosynthesize but their flowering isn’t affected. This results in more growth as the plants produce more sugars. Before LED lights it was difficult to create a pure blue light. Instead, most of the time other spectrums were filtered out, which can be an inconvenient process. Try using between 20 and 40 watts of mixed blue light per 1000 watts of regular light. I have done only initial experimentation with this so test this in a limited way first. I suspect that the additional light is an efficient way of increasing total yield
Aside from red and blue light, plants also use orange light for photosynthesis. I haven’t experimented with them yet, but orange LEDs might also help increase yield and probably can be lit continuously, just like the blues. More on this as the news breaks—or at least, as it fractures.
GREEN AND BLUE LIGHT AT NIGHT
As plants evolved for hundreds of millions of years they never actually had to deal with separation of light spectrums or unusual lighting regimes. When they received light it came from the sun in a mixture of spectrums and they could pick and choose which to use. It was only with the advent first of gas and then electric lighting that plants encountered unusual regimens and splintered spectrums.
Plants measure day length using the red light spectrum. While they use other spectrums for other purposes, they are not sensitive to them as far as flowering is concerned. They are almost totally insensitive to green light and for this reason reflect it back to us while absorbing most other spectrums.
Plants’ insensitivity to green light can be used to a gardener’s advantage. You know that turning the light on in the middle of the dark cycle disturbs the plants’ flowering paradigm. The light, HPS, fluorescent and MH lamps all emit red light. Green fluorescent and LED lights contain no red light and will not disturb the dark period. You can go in the garden under adequate light to work, as long as it is green.
Plants use blue light for certain regulatory processes and also for photosynthesis. Chlorophyll absorbs both blue and red light and uses the light’s energy to power the complex process in which water and atmospheric carbon dioxide are converted to sugar and oxygen gas. Blue light does not affect the regulation of flowering.
When blue light is turned on during the dark period, plants photosynthesize but their flowering isn’t affected. This results in more growth as the plants produce more sugars. Before LED lights it was difficult to create a pure blue light. Instead, most of the time other spectrums were filtered out, which can be an inconvenient process. Try using between 20 and 40 watts of mixed blue light per 1000 watts of regular light. I have done only initial experimentation with this so test this in a limited way first. I suspect that the additional light is an efficient way of increasing total yield
Aside from red and blue light, plants also use orange light for photosynthesis. I haven’t experimented with them yet, but orange LEDs might also help increase yield and probably can be lit continuously, just like the blues. More on this as the news breaks—or at least, as it fractures.
stardustsailor
Well-Known Member
Only one objection from me,Fran...
(And I'm guessing that you'll agree also ....)
Blue light does not actually promote 'sugars' ..
It mainly promotes protein biosynthesis .
Also,most of energy of blue wls,ends up as heat .
Not as chemical energy in form of carbonhydrates .
That 'part' ,'belongs' mostly to red wls ,I'm afraid ....
................
And what exactly Ed means by the 'regular light ' term ?
20-40 Watts out of 1000 is 2%-4% ....
I trust that blue wls ,are needed more than that percentage ..
(Around 15-20% ,ain't that correct ? )
FranJan
Well-Known Member
Ed's been pretty vague for a while nowadays 
so I guess regular light to him was HPS at the time he wrote that. Also he was stating that 500 watts of LED was equal to 1000 watts of HPS at that time too, but that's still less than 10% blue by his recipe. Maybe because of blues high PAR output? IDK. Ed's wasn't very pro LED last time I looked, so I don't think he "got" LEDs at the time. I do know C-Kools got his work cut out for him.
What strain of plants are you going to use C?
so I guess regular light to him was HPS at the time he wrote that. Also he was stating that 500 watts of LED was equal to 1000 watts of HPS at that time too, but that's still less than 10% blue by his recipe. Maybe because of blues high PAR output? IDK. Ed's wasn't very pro LED last time I looked, so I don't think he "got" LEDs at the time. I do know C-Kools got his work cut out for him.What strain of plants are you going to use C?
stardustsailor
Well-Known Member
What strain of plants are you going to use C?
Now ,that's a 'serious' question...
For sure genetics have lot's to do with flowering mechanisms and their particular responses to light ...
(power/spectrum/ duration ) ..
Yeah...
Crucial the answer ...
Now ,that's a 'serious' question...
For sure genetics have lot's to do with flowering mechanisms and their particular responses to light ...
(power/spectrum/ duration ) ..
Yeah...
Crucial the answer ...
Chronikool
Well-Known Member
Purple haze and moby dick...i dont think it is as important as what ratio of diodes i am running...i have 7 x xtes (rb), 10 x xmls (ww) and 10x xmls (nw) in a plan now..thoughtz!
stardustsailor
Well-Known Member
Both of pc white types do emit some red wls ...
Can't have them together with the blue leds ...
Two separate channels ,at least..
Veg with 100% of NW/WW & 10 % of blue
Flower ,
'daytime' : 100% of NW/WW & 0% blue
'night time': 0% of NW/WW & 10% blue..
How does that sound ?
A haze breedline 'specimen' will likely/most probably show weird responses.
(male flowers ,mutant flowers,fox-tailing,leaf-lamina budsite forming,etc )
Very sensitive Pr/Pfr equilibrium on those breeds ...(heavy sativa genome )
But ,better to have it tested ...Makes things more ...'spicy ' ..Sort of ...
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