24 hour light vs. 18/6.
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Skunk Baxter
Well-Known Member
Michiganjesse
Well-Known Member
With the right timer it can be done but hope you are home at all strange hours throughout your grow as times of lights on are going to change have read some people do crazy stuff like thisDude.......... What world, or time zone are you living in to get 30 hours in a day? lol
Bangaman
Active Member
Now why would you say I want to "Impress" you fellas whoever you are, whereever you are? Now is that not an idiosyncrazy to come on a totally anonymous forum and impress people you don't even know if they are real?
Just because you do something the wrong way and nothing bad or good happen because of it does not mean you are doing it right.
On that note, as I have said before, some people simply hate change or an opinion that comes from somewhere other than their own intelectual deductions no matter how limited their intelect.
On those two notes I think I have covered your comment. Oh as for the typos, "mey he who has novere sinned cast the first stone."
Odin*
Well-Known Member
Oh, the irony.
Yes, these plants can SURVIVE in 24 hours of light exposure, but they do not THRIVE. I have already posted the importance of maintaining appropriate light cycles, circadian rhythms, carbon fixation, etc. We are training "Olympic Athletes" (or, at least we all hope to), not trying to get an ill/starving child in a third world country through to the next day.
Yes, the plant can perform SOME of it's light independent processes while still exposed to light, but not all, and not in the same manner that it would in "darkness". The processes performed in the dark are quite different than those in the light. Besides the links provided (in my other posts/threads), we all know this to be true by "experience". If you really want to argue that fact, then please begin by answering this; If the processes performed during the night/darkness can be executed in full during the day, then how do you initiate flowering, as well as maintain it, in a non-auto cannabis plant without night/darkness?
Since you cannot, then you cannot by any means assert that the cannabis plant completes it's natural processes IN FULL without a period of darkness.
since1991
Well-Known Member
I say why complicate matters. If 24 works for you than why change it up? Iam saying 18-6 works for me..for years. I noticed clomes and seedlings and vegging plants do not show positive photo tropism (plants and leaves praying towards the light) after about 16 to 18 hours or so. My garden anyways. To each his own. I know many a grower that blast 24 hours or 20-4. But myself. ..i stick to what i see and like. 18-6.
Nugachino
Well-Known Member
My lights go off at 9pm and come back on at 4am. The one in the 90w led cabinet is doing better than the one that's outside getting sunlight. Same soil. Same watering and feeding methods. Just that one is outside getting between 12 and 23°c. The other gets between 17 and 31°c.
whitebb2727
Well-Known Member
I suspect you don't grow pot. You going around posting these "studies." You then come post them here and give advice.
This is the reason people are giving you a hard time. There is a difference in what's on paper and applying that in the real world. Its the reason I told you to post your own work. People will take you more seriously.
That paper is not entirely correct.
Cannabis does not need a dark period during veg. It is a c3 plant.
It just doesn't need it. Do I run 24/0? No. I don't even run traditional times. I run 18/6 for photos and 19/5 for autos.
I break mine up into blocks. Like 6/2 for photos and 6/1 for autos. I do it because of mid day depression. I have seen faster growth.
I immediately dismiss a paper that compares plants to humans. I prefer a dark period for my plants but is not needed for cannabis during veg. It harms them in no way.
Now quit arguing with "paper" and prove your point with your own work.
Odin*
Well-Known Member
No magic or mystery here people. ^This is how it is done (proper). Why is it even in question? (Please do not answer my rhetorical question, your "answer" is incorrect, even before conception).
BobCajun
Well-Known Member
That post I wrote up there saying 11/1/11/1 actually didn't work that well. I ended up going back to 6/2/6/2/6/2. Normal 18/6 might be better for the plants, idk. BTW, 24 hour light affects different plants differently. Some develop abnormalities or lower growth and others do fine and grow more. Weed seems to do fine with it. Haven't read anything that said otherwise. Might not be worth the extra power though, probably diminishing returns after a certain point.
rkymtnman
Well-Known Member
would love to see scientific (not pseudo science) proof that 18/6 is better than 17/7 and worse than 19/5 for vegging Cannabis.
since1991
Well-Known Member
I wouldnt. Why try an reinvent the wheel? I get the experimental shit with playing the photoperiod game...but honestly. ..been there done that. Ther are WAY more controllable factors and techniques a grower can employ to get what one wants out of a crop. Like i said..been there. ..done it.
BobCajun
Well-Known Member
All I could find so far was Ed's "Marijuana Grower's Handbook", in a Word document form (link). It says the following;
"Chapter Twenty-One - Early Growth
Once the seeds germinate, the light is kept on for 18-24 hours a day. Some growers think that there is no significant difference in growth rates between plants growing under 24 hours of light a day (continuous lighting) and those growing under an 18 hour light regimen. In controlled experiments there was a significant dif-ference: the plants get off to a faster start given continuous lighting. Some growers cut the light schedule down to conserve electricity. Plants grown under continuous light which are moved outdoors occasionally experience shock. This may be caused by the in- tense light they receive from the sun combined with the shortened day length. Another popular lighting regimen starts with continuous light. A week after germination the light is cut back one hour so that the regimen consists of 23 hours on and one hour off. The following week the lights are cut back again, to 22 hours of light and 2 of darkness. Each week thereafter, the lights are cut back another hour until the light is on only 12 hours a day."
"Chapter Twenty-One - Early Growth
Once the seeds germinate, the light is kept on for 18-24 hours a day. Some growers think that there is no significant difference in growth rates between plants growing under 24 hours of light a day (continuous lighting) and those growing under an 18 hour light regimen. In controlled experiments there was a significant dif-ference: the plants get off to a faster start given continuous lighting. Some growers cut the light schedule down to conserve electricity. Plants grown under continuous light which are moved outdoors occasionally experience shock. This may be caused by the in- tense light they receive from the sun combined with the shortened day length. Another popular lighting regimen starts with continuous light. A week after germination the light is cut back one hour so that the regimen consists of 23 hours on and one hour off. The following week the lights are cut back again, to 22 hours of light and 2 of darkness. Each week thereafter, the lights are cut back another hour until the light is on only 12 hours a day."
rkymtnman
Well-Known Member
i agree which is why i do 24/0 and 11/13. to each his own.
just saying there is no fact based science that says 18/6 and 12/12 is/are the "best"