12-1 lighting schedule, has anyone actually tried this?

LILBSDAD

LILBSDAD

Well-Known Member
Well I have had my mothers under the "12-1" schedule for two weeks now and they are not starting to flower so this part of it actually works. They seem to be growing at the same rate. I have had my next round of babies going under 12-1 for over a week and they are looking great. I am shocked that nobody else is interested in saving 5 hrs of electricity a day during veg! I will be testing out the end of this 12-1 cycle during flower, but have no doubt that end will work. People already reduce their lights during the end, so this is not going to be a problem. Guess I will have to journal one of my grows to get people on board since everyone seems to be more interested in threads about how to make crack cocaine
 
P

Precog420

Member
I've heard about this light schedule as well. I'm also lead to believe the benefits far exceed the savings on electricity.
 
jdmcwestevo

jdmcwestevo

Well-Known Member
your math on the electricity is off. it would be 150kwh i have a calculator for that stuff. so at $0.10/KWH you are looking at $15 a day.
 
jdmcwestevo

jdmcwestevo

Well-Known Member
and i've had plants go into flower under 18/6 so idk about 12-1 i can see the flowering times with going to 11/13 and decreasing because trike production and maturing happens at night anyway. i leave my plants in darkness for 72hours before harvest and they just pump resin during that time. i just think the 12 on 5 off 1 on 5 off that 1 on would stress out the plants thats not natural at all
 
Jack Harer

Jack Harer

Well-Known Member
LILBSDAD said:
Well I have had my mothers under the "12-1" schedule for two weeks now and they are not starting to flower so this part of it actually works. They seem to be growing at the same rate. I have had my next round of babies going under 12-1 for over a week and they are looking great. I am shocked that nobody else is interested in saving 5 hrs of electricity a day during veg! I will be testing out the end of this 12-1 cycle during flower, but have no doubt that end will work. People already reduce their lights during the end, so this is not going to be a problem. Guess I will have to journal one of my grows to get people on board since everyone seems to be more interested in threads about how to make crack cocaine
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5.5 hours off/1 hour on/5.5 hours off. Hmmmm....Just my own opinion, but this violates one of the most inviolate of all rules of indoor growing. Interrupting the dark period. Whether or not you're in veg or flower. You can flick the lights off and on all "Day" during the light period, but the dark cannot be interrupted. It's not the length of the day that triggers flowering, but the uninterrupted length of the dark period. You're gonna be lucky if they don't hermie.
Unless it's by a full moon, or a good lightning storm, the dark cycle is never interrupted in nature, so to say that giving them an hour of full daylight in the middle of their "night" mimics nature is just plain ridiculous if you think about it.

I know this is about keeping them in the veg state, but this is gonna HAVE to screw with the plants hormonal responses to light. Even in the veg state I would think.

My power co. charges .09 per K/H, so this method would save me less than .50 per light. I didn't switch to 1K lights because I was worried about my power bill. I wanna give the girls what they want/need.
 
potroast

potroast

Uses the Rollitup profile
No, I haven't tried anything less than 12 hours of light per day, because I want to grow the best plants that I can indoors.

I know it was written almost 30 years ago, and the research cited is older than that, I'm still going with Rob Clarke's Marijuana Botany. I give my flowering plants 13 hours of light and 11 hours of darkness.


Rob Clarke says that less than 12 hours of light per day will result in less THC produced. So here it is, like I've copied in threads on this board for years:


Marijuana Botany said:
Research has shown (Valle et al. 1978 ) that twice as much THC is produced under a 12-hour photoperiod than under a 10-hour photoperiod.
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(emphasis added)

So you can give your plants 10 hours of light per day, and they will produce half of the THC they would produce under 12 hours.

Therefore, I give my plants as much light as I can give them, while keeping them in flowering.

HTH :mrgreen:
 
jdmcwestevo

jdmcwestevo

Well-Known Member
potroast said:
No, I haven't tried anything less than 12 hours of light per day, because I want to grow the best plants that I can indoors.

I know it was written almost 30 years ago, and the research cited is older than that, I'm still going with Rob Clarke's Marijuana Botany. I give my flowering plants 13 hours of light and 11 hours of darkness.


Rob Clarke says that less than 12 hours of light per day will result in less THC produced. So here it is, like I've copied in threads on this board for years:




(emphasis added)

So you can give your plants 10 hours of light per day, and they will produce half of the THC they would produce under 12 hours.

Therefore, I give my plants as much light as I can give them, while keeping them in flowering.

HTH :mrgreen:
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im pretty sure that resin production happens ONLY during the dark period so i think you have it backwards. more light time doesnt make for resin/THC more dark time does. this is why a lot of growers will put their plants into 72-48 hours of darkness right before harvest to get more resin buildup before cutting them down.
 
Joedank

Joedank

Well-Known Member
After retracing the marijuana botany book i have found that I may have it backwards. Yes you still blackout for 36hrs indoors but I have plants that flower at 14 hrs on so it makes sense that the most robust plants fed the best diet would Handel more light by putting out more....
 
potroast

potroast

Uses the Rollitup profile
jdmcwestevo said:
im pretty sure that resin production happens ONLY during the dark period so i think you have it backwards. more light time doesnt make for resin/THC more dark time does. this is why a lot of growers will put their plants into 72-48 hours of darkness right before harvest to get more resin buildup before cutting them down.
Click to expand...

Well, I guess you are saying that Marijuana Botany is wrong. And if more dark time is the key to more THC production, then the best plants would be grown outdoors in the Arctic. :lol:

:mrgreen:
 
J

james2719

Member
jdmcwestevo said:
your math on the electricity is off. it would be 150kwh i have a calculator for that stuff. so at $0.10/KWH you are looking at $15 a day.
Click to expand...

hahahahha.... Are you serious? 150kwh?. Son go back to school. 5hrs at 1000wph = 5kw. which is $.50 (A DAY) which ends up being $15 per month.
 
LILBSDAD

LILBSDAD

Well-Known Member
Jack Harer said:
5.5 hours off/1 hour on/5.5 hours off. Hmmmm....Just my own opinion, but this violates one of the most inviolate of all rules of indoor growing. Interrupting the dark period. Whether or not you're in veg or flower. You can flick the lights off and on all "Day" during the light period, but the dark cannot be interrupted. It's not the length of the day that triggers flowering, but the uninterrupted length of the dark period. You're gonna be lucky if they don't hermie.
Unless it's by a full moon, or a good lightning storm, the dark cycle is never interrupted in nature, so to say that giving them an hour of full daylight in the middle of their "night" mimics nature is just plain ridiculous if you think about it.

I know this is about keeping them in the veg state, but this is gonna HAVE to screw with the plants hormonal responses to light. Even in the veg state I would think.

My power co. charges .09 per K/H, so this method would save me less than .50 per light. I didn't switch to 1K lights because I was worried about my power bill. I wanna give the girls what they want/need.
Click to expand...
Once again I did not write this, I am just trying it out. I still do not see why you think there is a huge difference between this and 18/6? The plants are still getting their five and half hours of dark period, just twice a day (and they don't know that). And a lot of people veg 24 hrs a day so there is NO dark period there. And why in Gods name do you think they would hermie in veg cycle? The flowering cycle is pretty much the same as a lot of people are using now. I know there are a lot of skeptics, but if my plants in veg are not flowering using this lighting cycle, then they are VEGGING!
 
ChronicClouds

ChronicClouds

Active Member
Ill try it! 12on 5.5off 1on 5.5off easy I'll set up a light on a timer 24 hours per day and water the plant as needed. I will run this experiment for 6 weeks at least. I'm sure we'll see flowering by week 4 if it doesn't work maybe even a hermie by then I'll be using an hps too!!
 
S

Slow Roll

Member
I guess I don't see the advantage. If you deliver fewer hours of light to your plant, you're going to save electricity but you're going to deliver fewer lumens. It's the same effect as swapping down to a smaller light.
 
Jack Harer

Jack Harer

Well-Known Member
LILBSDAD said:
Once again I did not write this, I am just trying it out. I still do not see why you think there is a huge difference between this and 18/6? The plants are still getting their five and half hours of dark period, just twice a day (and they don't know that). And a lot of people veg 24 hrs a day so there is NO dark period there. And why in Gods name do you think they would hermie in veg cycle? The flowering cycle is pretty much the same as a lot of people are using now. I know there are a lot of skeptics, but if my plants in veg are not flowering using this lighting cycle, then they are VEGGING!
Click to expand...

I didn't mean to come off like you oughtn't try it. I just gave my opinion of the concept. It flies in the face of every established idea that R. Clark and many other learned individuals have postulated. But then, the Quantum Theory flies in the face of everything we thought we knew about reality. If we didn't test things, we'd never learn. It's your crop. You wanna risk it in the name of experimentation? I'll take a ring side seat.
 
potroast

potroast

Uses the Rollitup profile
You are talking about two different things, vegging light times and flowering light times. For your vegging times, you can give your plants any amount and duration of light that you wish, as long as you don't give them 12 or more hours of uninterrupted darkness. The lighting scheme that you are describing is called a stasis regimen, because you are slowing the growth down while keeping them vegging.

For flowering, we want to give our plants light for as long as we can while keeping them in flower.

:mrgreen:
 
LILBSDAD

LILBSDAD

Well-Known Member
Sorry for the long delay guys! Summer is super busy for me but I will be updating this now. These have been vegging under the 12-1 lighting cycle from seed for a little over a month. Everything is looking great and my electric bill has went down 25%. I will start flowering these next week. Keep you updated.View attachment 1767612View attachment 1767610
 
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