Constant light in a room without reds for 12 hours...

vladimiroslav

vladimiroslav

Well-Known Member
There’s another aspect of LED that also has the potential to be transformational. Traditionally growers keep young plants basking in light 24 hours a day and then switch to a schedule that gives them 12 hours of light and 12 hours of darkness as they mature. The darkness slows the plants’ growth, but that simulated night is necessary to trigger the all-important flowering of buds.
SPARC’s production director, Robby Flannery, who holds a PhD in plant biology, says he may have figured out a way for his plants to have their buds and gorge on light too. To a plant, the absence of light in the red spectrum signals night. So by eliminating red light 12 hours a day while continuing to shine blue light, SPARC should be able to create plants that still produce buds while constantly absorbing light. “You can keep driving photosynthesis and trick them into thinking it’s nighttime,” he says. Flannery is setting up the A/B test now and plans to publish an academic paper in conjunction with the University of California–Davis later this year.
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What you guys think? It comes from a April 2014 Wired article but it seems I cant post the link for some reasons.
 
PSUAGRO.

PSUAGRO.

Well-Known Member
vladimiroslav said:
What you guys think? It comes from a April 2014 Wired article but it seems I cant post the link for some reasons.
Click to expand...
Obviously this needs some reasonable testing before considering 100% effective on flowering annuals(hermi!!). BUT it comes from UC davis(best US-ag school) and if proven correct, it IS a game changer. Also any" white" source will not work during the dark/night phase. Monochromatic leds will come back to glory!!! lol

AND before anyone starts the "plants need sleep" too, most US weight records where done in the Alaskan summer season.............sooooooooo happy growing:)

looks like it's time to buy an advanced veg(all monochromatic blue) cree xt-e panel!!!ha
 
FranJan

FranJan

Well-Known Member
http://www.wired.com/2014/04/high-tech/#section-3

"There’s another aspect of LED that also has the potential to be transformational. Traditionally growers keep young plants basking in light 24 hours a day and then switch to a schedule that gives them 12 hours of light and 12 hours of darkness as they mature. The darkness slows the plants’ growth, but that simulated night is necessary to trigger the all-important flowering of buds.

SPARC’s production director, Robby Flannery, who holds a PhD in plant biology, says he may have figured out a way for his plants to have their buds and gorge on light too. To a plant, the absence of light in the red spectrum signals night. So by eliminating red light 12 hours a day while continuing to shine blue light, SPARC should be able to create plants that still produce buds while constantly absorbing light. “You can keep driving photosynthesis and trick them into thinking it’s nighttime,” he says. Flannery is setting up the A/B test now and plans to publish an academic paper in conjunction with the University of California–Davis later this year."

For some reason I can't see this working for all strains or even throughout flowering.
 
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stardustsailor

stardustsailor

Well-Known Member
Interesting !
If that proves to be true ...
I (yes me ! ) might even recondsider for monochromatics !
(My gosh....)
VERY INTERESTING !
Someone has to try it ASAP...
(Unfortunately I can't right now....Not enough cash around ...for a monochromatics led panel ..)
 
bicit

bicit

Well-Known Member
I wonder how effective that extra growth will actually be. Would they still develop correctly under 12hours of mono chrome blues? We all know that light is used for more than just driving photosynthesis.

I'm very interested to see the results, any experimentation is good. However I don't forsee this going according to plan. Hopefully I'm wrong.

Hmm... just extrapolating a bit here. Since the hypothesis is that 'red' light is the signal for day time, does that mean that one could use supplemental UV-B during the 'lights out' cycle as well?
 
hyroot

hyroot

Well-Known Member
i don't see it working for mj.. especially during flower.. the blue region induces more foliage growth and makes flower lagg. improves par but diminishes yield with a blue dominant light during lights on. Then if the plant is still doing photosynthesis. then its not sleeping and not going into its pfr state.
 
PSUAGRO.

PSUAGRO.

Well-Known Member
bicit said:
I wonder how effective that extra growth will actually be. Would they still develop correctly under 12hours of mono chrome blues? We all know that light is used for more than just driving photosynthesis.

I'm very interested to see the results, any experimentation is good. However I don't forsee this going according to plan. Hopefully I'm wrong.

Hmm... just extrapolating a bit here. Since the hypothesis is that 'red' light is the signal for day time, does that mean that one could use supplemental UV-B during the 'lights out' cycle as well?
Click to expand...
YES...........on the uv-b

hyroot said:
i don't see it working for mj.. especially during flower.. the blue region induces more foliage growth and makes flower lagg. improves par but diminishes yield with a blue dominant light during lights on. Then if the plant is still doing photosynthesis. then its not sleeping and not going into its pfr state.
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who knows really, no one has tried it before.................somebody in here should take a shot at it with some crappy seeds:)
 
stardustsailor

stardustsailor

Well-Known Member
Ooooppsss It's just came to me ...

A RIU member ...
Has had some plants under one Astir panel of 24x 450-470 nm ..
Clones ,I think ....
And they vegged superb ,from what he said ...

Or something like that ...
I don't remember ...
And I think he put them in flowering also?
I might be wrong ...
Bluesdude+ something ,I think it was ...
 
PSUAGRO.

PSUAGRO.

Well-Known Member
bicit said:
Any documented results? What are the effects?
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I meant that narrow band uv-b can be used in the lights off time if all "blue" is required for the unproven theory above^^^

UV-b supplementation has been debated to death IMO........some growers love it and other won't use it=== try it yourself and see first hand.
 
Chronikool

Chronikool

Well-Known Member
vladimiroslav said:
What you guys think? It comes from a April 2014 Wired article but it seems I cant post the link for some reasons.
Click to expand...
http://www.wired.com/2014/04/high-tech/

PSUAGRO. said:
somebody in here should take a shot at it with some crappy seeds:)
Click to expand...
I'll give it a go....will 'update' my PC 'INDA-KNOW' (when the party cup comp finishes) with some XML-2's (warms and neutrals...one circuit) and some XT-E's (or XP-E's) (separate circuit)

Which wavelength(s) do i want? 450-460nm?
 
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