SSGrower
Well-Known Member
IMO a big advantage of phosphor reds in addition to spectral distribution is the diffusion. Diffusion = Penetration
The far red thread
- Thread starter Rahz
- Start date
Rocket Soul
Well-Known Member
You could try running 240w of 3500-4000k 90cri of white, in order to only add lets say 15% 660 and 5% far red and 5% uv and violet; lets say 360 and 420nm. That should be a solid combo, 90cri leds have plenty of 630.
hybridway2
Amare Shill
I don't think you're wrong. Have at it. They grow under anything.
Idk about percentages unless i look at the spec sheets i have.
Double Bump the 630 n 660 n add 5-7% Far-red (730). Lil 470 would be my min added to the above.
I'd go more of a broader spectrum if it were me but that's just me. Maybe you'd rather add later if you so decide.
weed-whacker
Well-Known Member
sorry i dont understand "double bump"
hybridway2
Amare Shill
Um 630 + 660.
weed-whacker
Well-Known Member
k i thought u were saying to double the ratios
end_of_the_tunnel
Well-Known Member
Another post I knew I had seen. Not in the far red thread, but useful example from Randomblame (again), for those trying to figure out how much of what of the different types of red.
Look at the post number, lol.
UV Suppliment Lighting
Like every other led made it is equivalent the 9 watt led in my bathroom is equivalent to 60 watts I am well aware of that marketing ploy and really it is a total lie and can make buying online difficult. Same goes for felt-fabric pots, 5 gallon isn't 5 gallons, maybe like 4 gallon if, it...
www.rollitup.org
Look at the post number, lol.
salmonetin
Well-Known Member
eseee Rahzzzzzzz 
While I was upset you didnt want to help me understand more about the Amare far red I know now it is because you wanted me to do my own research
I found the spectrum from amare on your bar8 thread and its clear that amare uses very little far red maybe 1% so this means that 1% far red is all thats needed to be a grower like you. Those other led lights have too much far red and do not work like amare
Thanks @hybridway2 for being such a great teacher of all things to do with light spectrum and science you are truly the lord of light
As a side note to this thread ,it should
be noted that cannabis plants use more & more FR light for PS towards the end of their life cycle .
More info :
be noted that cannabis plants use more & more FR light for PS towards the end of their life cycle .
More info :
Photosynthesis Under Solid State Light. Setting the Standards .
Lot's of fuss about which spectrum is most appropriate for photosynthesis ,to be set as a standard ... Well ...Just because of the diversity of plant species involved ,actual growing environments ,cultivating techniques and plenty of other factors to be taken into consideration,is no wonder...
www.rollitup.org
What kind of light mj 'likes ' ? Decoded from it's reflectance ....
...... Nitrogen fertilising affects light absorption ... ..... .......... ...... ..... For more info ...=>>> _____________________________________________________________________________________________________ Mj is a "light-sponge" of a plant .... It reflects less than 20% of incident...
www.rollitup.org
salmonetin
Well-Known Member
Saludos
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salmonetin
Well-Known Member
....hey Doctor B.... we need an video with the UV light and NEAR UV light too.... for my POV... other forgeted light zone...
Saludos
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grotbags
Well-Known Member
awsome.... i would probably have never found those posts that if you hadnt linked them, thank you.
end_of_the_tunnel
Well-Known Member
Flowering plant X grown in full sunlight in one location somewhere on the globe, might finish with different characteristics compared to the same flowering plant at same location under shade, where surrounding foliage attenuates the lower wavelengths.
Three things happening with the light outdoors. Length of day. Subsequent diminishing DLI. Gradual increase in red component of light.
Far red for end of day treatment can lead to potential internode elongation, with some caveats. But how much of what growers are reporting with EOD is placebo effect?
When we can see other growers here reporting a small but noticeable reduction in flower time with common white leds (compared to their former HPS lamps), where any reds are part of an always on spectrum? Maybe Pr and Pfr action is speeded up like a ticking clock?
Thanks for those links.
Age and life cycle state of cannabis alter the effects of certain wls .The younger the plant ( vegetative growth state ) the more pronounced the internodal elongation ,under FR illumination. At the mid & last stages of reproductive state (mid & late flowering ) FR light will not induce
internodal elongation.
Most benefits will occur when
supplemental FR illumination is used
only from mid flowering till end of life.
FR illumination should be avoided
during the vegetative growth stage as also at early flowering (transition from vegetative to reproductive state ) .
internodal elongation.
Most benefits will occur when
supplemental FR illumination is used
only from mid flowering till end of life.
FR illumination should be avoided
during the vegetative growth stage as also at early flowering (transition from vegetative to reproductive state ) .
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wietefras
Well-Known Member
So what this clip shows:
Is that there is no difference in photosynthesis from FR or 400-700nm photons. Adding FR photons into the total count (right chart) just shows the same line as with the usual PAR photons:
After that chart he explains the reason for the increase in growth is shade avoidance. So this infomercial about their new sensor which can detect FR specifically explains that FR is only beneficial for leafy greens and not suited for plants like tomatoes.
FR gives no extra photosynthesis and only induces stem elongation and other shade avoidance systems in the plant.
So from that Apogee FR sensor infomercial one would deduce that adding FR does not help for cannabis.
Is that there is no difference in photosynthesis from FR or 400-700nm photons. Adding FR photons into the total count (right chart) just shows the same line as with the usual PAR photons:
After that chart he explains the reason for the increase in growth is shade avoidance. So this infomercial about their new sensor which can detect FR specifically explains that FR is only beneficial for leafy greens and not suited for plants like tomatoes.
FR gives no extra photosynthesis and only induces stem elongation and other shade avoidance systems in the plant.
So from that Apogee FR sensor infomercial one would deduce that adding FR does not help for cannabis.
Rocket Soul
Well-Known Member
Interesting. I suppose you can argue that adding far red might do something to flowering response and if we accept that far red is the same as everything else (apart from stretch): the high nanometer on these leds means that you get relatively large number of photons per watt, as the energy contained in each is approx half that of a uva 365nm photon.
end_of_the_tunnel
Well-Known Member
I like that forgotton photons video. Brings up lots of interesting things like the flowers on the tomatoes where he almost winks. Also the slide he shows at around the 13:25 mark. That is significant.
I'm sure FR for end of day is useful. It adds another potential point of failure and complexity. Thread by torontoke shows an alternative way to hasten time to flower and finish. Worth a read.
And I'm sure its a useful component of the always on spectrum. Just have to set a balance.
I'm sure FR for end of day is useful. It adds another potential point of failure and complexity. Thread by torontoke shows an alternative way to hasten time to flower and finish. Worth a read.
And I'm sure its a useful component of the always on spectrum. Just have to set a balance.
Research has shown that cannabis can complete it’s full life cycle without any FR light .
Any use of FR light is most probably
limited to experiment with the circadian cycle of the plant ,which might lead to reduced flowering periods without any losses both at quantity and quality of the harvest .
Still,I will agree that some FR should be included in the spectrum ( 3000K 80 Ra white LEDs provide more than enough FR ) ,just to keep the phytochrome at a more “natural “ equilibrium ,during the “lights on “ period.
Any use of FR light is most probably
limited to experiment with the circadian cycle of the plant ,which might lead to reduced flowering periods without any losses both at quantity and quality of the harvest .
Still,I will agree that some FR should be included in the spectrum ( 3000K 80 Ra white LEDs provide more than enough FR ) ,just to keep the phytochrome at a more “natural “ equilibrium ,during the “lights on “ period.