Light Cycles

heywhatsthatsmell

heywhatsthatsmell

Well-Known Member
Have been wondering about this for awhile but have never taken the time to experiment so im gonna try to explain my thoughts the best i can and i would like everyones thoughts and opinions. Marijuana needs to be given a set amount of light to keep it in vegetative state. Now when moving into the flowering stage growers flip their lights to a 12/12 light cycle. Now heres my question as we all know our daily cycle is 24 hours. Well i want to change that. So is flowering triggered by only receiving 12 hours of light per day or 12 hours of dark in a day? Now lets say the plant is triggered by receiving 12 hours of light in a day what i could do is change the daily cycle to 18 hours with 12 on and 6 off. So now by me doing this would it stay in the flowering stage? And if it did would it not result in a higher yield due to extra light over a given period of time but in no more than 12 hour increments? Just a bit of deep thinking let me know what your thoughts are
 
Your Grandfather

Your Grandfather

Well-Known Member
heywhatsthatsmell said:
Have been wondering about this for awhile but have never taken the time to experiment so im gonna try to explain my thoughts the best i can and i would like everyones thoughts and opinions. Marijuana needs to be given a set amount of light to keep it in vegetative state. Now when moving into the flowering stage growers flip their lights to a 12/12 light cycle. Now heres my question as we all know our daily cycle is 24 hours. Well i want to change that. So is flowering triggered by only receiving 12 hours of light per day or 12 hours of dark in a day? Now lets say the plant is triggered by receiving 12 hours of light in a day what i could do is change the daily cycle to 18 hours with 12 on and 6 off. So now by me doing this would it stay in the flowering stage? And if it did would it not result in a higher yield due to extra light over a given period of time but in no more than 12 hour increments? Just a bit of deep thinking let me know what your thoughts are
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IMHO, flowering is triggered by less light today than there was yesterday. From Dec. 23_I think_the days start getting longer by 3 minutes per day, until the summer solstice_don't ask me when_at which point in time the sun starts to set 3 minutes sooner. As I understand it, it is at this time that outdoor weed gets the trigger to stop screwing around and put out some buds.


I have often thought about messing with the cycle but never did it.
 
heywhatsthatsmell

heywhatsthatsmell

Well-Known Member
so it could be the the curve in daily light that triggers it rather than 12-12? in that case if i lower my current 24/0 cycle to 23-1 and then four days or so later to 22/2 at what point would it begin to bud if at all
 
heywhatsthatsmell

heywhatsthatsmell

Well-Known Member
well if it needs 12 hours of uniterupted darkness then could you extend your schedule to 30 hours and do 18 on and 12 off??????
 
tahoe58

tahoe58

Well-Known Member
what fdd said......this has been tested a lot....there is a threshold of darkness that is required for the plant to complete its growth cycle. It had been suggested to me to try 12/6 and reduce total time by 1/4.....but this violates the darkness principle. I have also heard of the 36 hr day, 24/12.....I have settled on 14/10 as this is slightly pushing the limit (I had heard 11 hours darkness is a limit.....but also smaller increments of 15 min and 30 min leaading to 10:30 or 10:45....). Its prolly all been done before....but I wanted to try it for myself - I did that after two weeks of 12/12......my thought being that the plants would not revert after that? I guess I'll find out eh?
 
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