sniff sniff... what's that smell? Oh it's the stench of a brain fart lol, yes TGB my most excellent calculating brother, I meant 12, 5, 2, 5. But now that Senior Hardon has decreed I stick to the 12, 5.5, 1, 5.5 that's what I shall do.
The GLR Light Schedule (Gas Lantern Routine)
- Thread starter hardon
- Start date
ThaGreenBandit
Student of Herbal Alchemy
That is what the GLR is all about - Mannin' up, checkin' your nuts and stylin' it out
Be sure to keep us posted on how they turn out.
Cheers,
Hardon
Ha! Ha! You know how we do!! For the betterment of cannabis cultivation!!! LOL!
I had actually considered doing the same exact thing. I was like, "Maybe I should just go ahead and give my babies one extra hour of light! Just one!!!" Then I was like, "Fuck that. They gets 12, and they better like it."
[QUOTit="ThaGreenBandit, post: 924906, member: 22404"]Ha! Ha! You know how we do!! For the betterment of cannabis cultivation!!! LOL!
I had actually considered doing the same exact thing. I was like, "Maybe I should just go ahead and give my babies one extra hour of light! Just one!!!" Then I was like, "Fuck that. They gets 12, and they better like it."[/QUOTE]
Like It? I hope they love it lol.
I had actually considered doing the same exact thing. I was like, "Maybe I should just go ahead and give my babies one extra hour of light! Just one!!!" Then I was like, "Fuck that. They gets 12, and they better like it."[/QUOTE]
Like It? I hope they love it lol.
Sorry, skeptic that I am, I'm not buying it at all. Having checked several forums, and looking for science to support it, ( and NO, anecdotal "evidence" does not trump science.. ), I can find no benefit to this method. Plants, just like animals, have a circadian rhythm. In some plants, this rhythm is accurate to within 1 minute! Disrupting that rhythm stresses the plant.
1. saving money?? what, 10 to 20 cents a day? but you'll spend $100 on nutes??
2. Plant stress, yup, this is a sure formula for creating hermies
3. equipment stress. Using HPS or MH? every time you turn them on and off, you shorten their useful lifespan, and the same applies to ballasts, etc. LED drivers are degraded this way also. Kiss that 10cents goodbye!
Growing a tent full this way proves nothing. show me a side by side grow of identical clones using GLR for one tent and regular light schedule for the other, then we'll see. from what I've read on other forums, there was no evidence of improved growth or production. none to negative impact was the most common outcome. I've seen no one do a side by side comparison so I'm still open to evidence that supports this concept. Your links don't work btw. some links to this and other positive results would be appreciated also, as I found none that offered any kind of believable evidence.
I'm all for any techinque that can be proven to improve our skills. anyone who wants to prove this works, I suggest you post a well laid out comparison grow in Franenstein's lab. That's where we sort out what works and what doesn't!
You might find reading on the phytochrome response ( PR to PFR conversion ) interesting.
1. saving money?? what, 10 to 20 cents a day? but you'll spend $100 on nutes??
2. Plant stress, yup, this is a sure formula for creating hermies
3. equipment stress. Using HPS or MH? every time you turn them on and off, you shorten their useful lifespan, and the same applies to ballasts, etc. LED drivers are degraded this way also. Kiss that 10cents goodbye!
Growing a tent full this way proves nothing. show me a side by side grow of identical clones using GLR for one tent and regular light schedule for the other, then we'll see. from what I've read on other forums, there was no evidence of improved growth or production. none to negative impact was the most common outcome. I've seen no one do a side by side comparison so I'm still open to evidence that supports this concept. Your links don't work btw. some links to this and other positive results would be appreciated also, as I found none that offered any kind of believable evidence.
I'm all for any techinque that can be proven to improve our skills. anyone who wants to prove this works, I suggest you post a well laid out comparison grow in Franenstein's lab. That's where we sort out what works and what doesn't!
You might find reading on the phytochrome response ( PR to PFR conversion ) interesting.
Hey all,
I used to be a PP grower and had a real interest in light schedules. I researched the topic loads back then as I figured there must have been a better way than 24/0 veg, 12/12 flower. It was during my research that I stumbled upon the GLR routine. GLR stands for Gas Lantern Routine as the Victorians used a gas lantern in place of a big fuck off HPS back in the day
So the basic theory behind the routine is this. Cannabis plants need only 13 hours of light to stay in the vegetative growth stage. The GLR (12-1) lighting schedule is as follows - 12 hours lights on, 5.5 off, 1-hour on, 5.5 off, and repeat schedule. The 1 hour on in between off period fools the plants that stay in vegetative growth state. Your immediate savings are 5 hours in energy costs daily (versus 18/6), as well as your bulbs and equipment lasting longer. But how do the plants react to this lighting schedule? You see immediate growth response from your plants, they are happy from the added rest time. The plants are bushy with twice as many bud sites without topping or bending, In fact when you top and stretch your plants out, you get many more bud sites than you would have had under 18-6 using same procedure of topping and stretching plant, your growing bigger and better and faster.
I used to use this schedule all the time and found it produced bigger and better plants at the end of the veg period as opposed to any other schedule I'd used. However I made the switch to autos a few years ago and for some reason, I never considered using the GLR with them. I soon forgot all about the GLR until I happened to stumble across my research a couple of weeks ago and it sparked my interest once again.
A few years ago searching for anything GLR related produced very few results but a quick search now produces quite a few results, the majority of which are positive for the GLR. I don't want to link to other forums but even AFN's very own Groff ran the GLR in this grow with amazing results.
The potential benefits to the plants under this schedule are huge, better growth, less stress, thicker stalks and branches, all of which equates to a bigger harvest. The potential savings with this method are also huge, 35 hours of light less each week soon adds up to be big saving over the course of a grow. It can be used to overcome the trouble that summer brings. For example I always used the GLR during the summer, running the lights at night at full power when it was cooler and for one hour in the late afternoon at a lower setting to combat the heat during the day.
I suppose nothing speaks louder than actual results so I am going to run with the GLR for my current grow. The seeds went in the soil on Wednesday and haven't broken through yet. You can find the thread here although I will keep this thread updated with any GLR related info from the grow.
Thanks for dropping in!
Cheers,
Hardon
I'm with you on this Pop22. I have yet to find any positive documentation or science on this subject beside saving a few dollars.
While I am not motivated enough to try the clone grow which I agree would be a more valid study, when we do get this rolling, we need several members trying the same method to get an accurate assessment of the validity of the glr method and uvb too by the way but again not at the same time to limit variables and with several members doing their own grows and sharing their results. Equipmet has to bethe same at each tent at each grow site, but the conglomerate total grows do not need to use identical equipment.
ThaGreenBandit
Student of Herbal Alchemy
Aside from a tiny bit of stretching, I've seen no negative affects so far. A side by side would be cool, though
Am 100% with you on the science beats anecdotal evidence which is one of the reasons I started this thread - In the hope of gathering enough evidence to prove the science
I do not have my research to hand to reference all my research and give you a more detailed response but will try to clarify a few things...Most plants (including cannabis) do have a circadian rhythm. but it has been proven that plants use light as a trigger to synchronize their internal clocks to their environment. Cannabis is a short day plant meaning that they use the length of the dark period as a trigger to begin flowering. They cannot flower under short nights or if a pulse of artificial light is shone on the plant for several minutes during the night; they require a continuous period of darkness before floral development can begin. Natural nighttime light, such as moonlight or lightning, is not of sufficient brightness or duration to interrupt flowering.
It is this principle that the GLR is built on. The short interruption of the dark cycle is enough to 'reset' the time count of uninterrupted darkness meaning the plant cannot flower as the correct conditions and triggers do not exist. Of course this applies to photoperiod plants and not so much auto-flowers which are more day neutral plants than short day...
1. Electric must be pretty cheap where you reside. Where I live I've worked out that it costs me £1.35 a day to run my 400w lamp for 20 hours. That works out around 7 pence an hour. Using the GLR vs 20/4 over a ten week grow, it equates to a saving of £35.
2. Do you really believe that providing a plant with an unnatural 18 or more hours of light a day isn't stressful??? I will respond further to this when I have my research to hand....
3. Agreed. That is why I would recommend using a cheap CFL for the 1 hour on....
I would love nothing more than to have the space to run multiple grows but I do not have that luxury unfortunately. The links I've provided in this thread are all from AFN as I was unsure about the rules regarding linking to external sites. However the evidence is out there if you dig deep past all the skeptics who dismissed the concept without ever trying it. I have personally used the GLR a number of times and in my opinion, it produced far superior plants than any other schedule I've used. However these were all photoperiod plants - I have not used the GLR for an auto run yet.
I am familiar with phytochrome response and the science behind it. However I will revisit this again and come back to you on it....
Thanks for your input and sorry I couldn't offer you a more detailed response. That is what this thread is all about
I will come back and expand of this when I have more time.Cheers,
Hardon
Last edited:
… hope you enjoy 
Similar threads
