Register ICMag Forum Menu Features Search Today's Posts Mark Forums Read
You are viewing our:
in:
Forums > Marijuana Growing > Cannabis Botany and Advanced Growing Science > Manipulating Short Day Length Flowering Using Narrow Band LED Lighting?

Thread Title Search
Post Reply
Manipulating Short Day Length Flowering Using Narrow Band LED Lighting? Thread Tools Search this Thread
Old 12-06-2018, 09:46 AM #11
Douglas.Curtis
Senior Member

Douglas.Curtis's Avatar

Join Date: Jul 2016
Location: Back in Colorado! Yaay!
Posts: 3,716
Douglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant future
I remember looking for additional information as well and coming up empty. Good find on the article you linked, it's indeed rather close. I believe your theory will be at least partially true as well. What I do know is if this is possible, there's a whole new field to master.
Douglas.Curtis is offline Quote


Old 12-07-2018, 04:56 AM #12
f-e
Member

f-e's Avatar

Join Date: Mar 2008
Location: E.Mids
Posts: 296
f-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nice
So leaving the blue lights on didn't effect flowering we think? The plant was effected by just the upper reds though.

If that leaves us looking for a coloured light that doesn't stop flowering, but does plump up buds, I may have something.

I see I have your interest.

A little green light on an ozone generator under a plant, attracted a branch to it. It went unnoticed for some time. This little branch had a terminal bud right against the led that was nothing like the scratch anywhere else. What should of been a bit of air-bud unworthy of trimming, had become a nugget.

One little voice said "well the plant in general was full of flower power, so this little bit didn't matter" but I know you can cover a single branch and it will flower. Flow of chemicals within the plant.. I don't know. I have since then used 100+ green leds (like christmas lights) in a big ball within a plant. It proved green didn't effect flowering, and seemed to have a positive effect. No unexpected nuggets that screamed out at me though. More recent research by others suggests green energy is useful, and if not immediately so, there is a 'pass it on' effect of up-conversion until something useful is made. So I think green light is an energy source that plants can use, and doesn't break the long nights required (it's not a short day plant) for flowering. I can't say that bud developed at night though. Maybe the green was only of use when it was with other colours.

On a different tach, back then I didn't ground my systems. That whole grow was at many thousands of volts. Introduced by the ozone generator at that point. Maybe that was the stimulus that made it outstanding. It's a funny story actually. I'm squinting at a leaf looking for mites one day, when it lifts towards my face, and as it gets to my nose, with me watching all dozeyed. It chucks a lightening bolt at me. Right on the end of my nose! A temporary state of 'wtf' followed, before I figured out that grounding the tank was a good idea.
f-e is offline Quote


Old 12-07-2018, 06:34 AM #13
f-e
Member

f-e's Avatar

Join Date: Mar 2008
Location: E.Mids
Posts: 296
f-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nice
My bad. Negative ion generator. Not ozone.
f-e is offline Quote


Old 12-07-2018, 07:52 PM #14
Douglas.Curtis
Senior Member

Douglas.Curtis's Avatar

Join Date: Jul 2016
Location: Back in Colorado! Yaay!
Posts: 3,716
Douglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant future
The article mentions manipulation of blue light during a specific point in the day.
Quote:
In the lab, chrysanthemums have been forced into bloom without the traditional practice of curtailing their daily exposure to daylight. This will allow growers to produce bigger plants in flower. “It’s to do with playing around with the blue light at the right moment of the day,” Marcelis says. “Its internal clock is affected differently, so it doesn’t completely recognize it’s still day.
Interesting information on the green lighting experiences you had. I've noticed green light equipment on the market now, for working with cannabis at night. I wouldn't be surprised to see green light "charging" bays, for bathing the plants with green light a few hours before lights on.

I wonder if the chrysanthemums flower out normally, or if there are drawbacks.
Douglas.Curtis is offline Quote


Old 12-08-2018, 03:07 AM #15
f-e
Member

f-e's Avatar

Join Date: Mar 2008
Location: E.Mids
Posts: 296
f-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nicef-e is just really nice
I guess red light could be a wake up call, while the dropping blue light levels could insinuate the day is over. It fits around what natural light does. So perhaps they introduce blue light, just so they can turn it off again. The drop in blue illumination being the key.

It's interesting stuff, but it's a day length plant, and iirc ours are not. There was talk of speeding the transition to night with the upper red spectrum once. I was only half listening, but the photochrome ratio change was being rushed along with 730nm perhaps.

I must catch up on the work revolving around the shortest night possible, coupled with the longest day possible. The sum of which, wasn't intended to equal 24 hours.

It's odd how much resistance to green work lighting there has been. The idea was failing a little ~30 years ago, likely because painted incandescent lamps emit far red. That's about when I started making green led torches. Lately head torches have been offered with both white leds, and a red one for hunting at night. Swapped for a high brightness green led, they can be a nice addition to your kit. At under $10 the 10 meter string of 100 green leds should be part of many more peoples setups to. I can't imagine a grow I can't visit because the lights are out.

And drifting back to topic eventually, I will have a go at lighting a plant with just green, and see if it lasts a week. I have a 100 led string spare and it's cutting selection time almost. I can pop a few in a box with the green lights, and see if they do anything compared to the keepers.
f-e is offline Quote


Old 12-08-2018, 06:11 AM #16
Douglas.Curtis
Senior Member

Douglas.Curtis's Avatar

Join Date: Jul 2016
Location: Back in Colorado! Yaay!
Posts: 3,716
Douglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant future
Quote:
Originally Posted by f-e View Post
It's interesting stuff, but it's a day length plant, and iirc ours are not.
It's a short day plant, just like cannabis.
Douglas.Curtis is offline Quote


Old 12-08-2018, 06:57 AM #17
Dankwolf
Senior Member

Dankwolf's Avatar

Join Date: Sep 2016
Location: Oregon
Posts: 1,563
Dankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud ofDankwolf has much to be proud of
Quote:
Originally Posted by Douglas.Curtis View Post
It's a short day plant, just like cannabis.
Can't remember the article but it pretand to plants that flower by photo period (class c I believe). Any way they interrupted. For just a few min every 6 hours with a red 730 nm light and were able to flower under 24 hour light if you count the red 730 nm red light only inturuption every 6 hours .

The study was way more in-depth then I can explain or remember but you get the idea .

I played with 730 nm led's for awhile it improved flowing in a slightly earlier harvest . gave up after a few runs due to the fact oregon is a competive market and simplicity is key to compete .

__________________
Dankwolfs rks breeding project and breeding info discussion

Yes i know i cant spell for shit and my punctuation is just as bad . the plants dont seem to care nor should you.
Dankwolf is offline Quote


Old 12-08-2018, 08:13 PM #18
shaggyballs
Senior Member

shaggyballs's Avatar

Join Date: Nov 2012
Location: Hold your hand up...right about there!
Posts: 2,163
shaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud of
Not sure if this is the same tech or not.
https://www.dailymail.co.uk/sciencet...day-night.html
__________________
Vote no to legalize cannabis or else!
HydroBuddy
Nute calculator
Ins and outs of Pythium
OVERGROW FAQ

SEEDPAC Politically Active Cannabis

Fighting for Michigan's Medical Marihuana
Patients and Caregivers rights


I am free because I know that I alone am morally responsible for everything I do. I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.
shaggyballs is offline Quote


Old 12-08-2018, 08:33 PM #19
shaggyballs
Senior Member

shaggyballs's Avatar

Join Date: Nov 2012
Location: Hold your hand up...right about there!
Posts: 2,163
shaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud ofshaggyballs has much to be proud of
double post
__________________
Vote no to legalize cannabis or else!
HydroBuddy
Nute calculator
Ins and outs of Pythium
OVERGROW FAQ

SEEDPAC Politically Active Cannabis

Fighting for Michigan's Medical Marihuana
Patients and Caregivers rights


I am free because I know that I alone am morally responsible for everything I do. I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do.
shaggyballs is offline Quote


Old 12-08-2018, 09:35 PM #20
Douglas.Curtis
Senior Member

Douglas.Curtis's Avatar

Join Date: Jul 2016
Location: Back in Colorado! Yaay!
Posts: 3,716
Douglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant futureDouglas.Curtis has a brilliant future
VERY interesting. Both the 730nm and the lettuce farm. I can see how the lettuce would be a lot easier, since there isn't a flowering period, but the tech of having 24hr lighting optimized using feedback is awesome.

I still believe it's going to have to be all LED lighting, with specific wavelengths not present in the 24hr lighting. Crazy stuff.
Douglas.Curtis is offline Quote


Post Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT +2. The time now is 07:54 AM.




This site is for educational and entertainment purposes only.
You must be of legal age to view ICmag and participate here.
All postings are the responsibility of their authors.
Powered by: vBulletin Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.