Reduced hour light cycles

Discussion in 'Advanced Marijuana Cultivation' started by torontoke, Aug 9, 2017.


    ttystikk Well-Known Member

    A lot of people say that GLT (gaslight timing) accelerates the transition into bloom. 12 hours on, 5.5 hours off, 1 hour on, 5.5 off and repeat.

    Have you tried anything like this?
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    thccbdhealth Well-Known Member

    I just did that on my last run.
    but reversed to your description.
    5.5 on
    .5 off
    5.5 on
    12.5 off
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    ttystikk Well-Known Member

    The only difference is 30 minutes of light in the middle instead of an hour.
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    rkymtnman Well-Known Member

    have you done any historical searching on GLR? i remember google searching for it and the one thing that wasn't really explained was if the K value of the light source is important? back in the day, it really was a gas lantern that they'd light up to break up the dark period which i would think would be very red in K value. wonder if that makes a difference or just the fact that the dark period was broken up was what kept them on the brink of flowering? thoughts?

    ttystikk Well-Known Member

    Hadn't thought about it. Since I was looking for stretch in veg, it was natural for me to use red heavy light.

    I tried GLT with 4100K CMH lights and didn't like it because I got basically no stretch.
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    hillbill Well-Known Member

    I have enough trouble maintaining standard 18/6 or 20/4 light cycles. Simple guy, simple schedule, KISS type guy here. Really liking 10/14 in flower for every reason I can think of.
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    pedrovski Well-Known Member

    Using a one of the sonoff wifi timers make all these custom light schedules super easy to set up.

    I do however have a question about this glt schedule.
    Ive got 730nm leds in a tent with 3500k 90cri citizen cobs that i would generally run for 10 mins on lights out on a 12-12.

    Any suggestions on adding these 730nm leds into this lighting schedule?

    Maybe just an extra 5 mins after the hour on?
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    torontoke Well-Known Member

    There's a lot more difference then that.
    A standard glr is 12 on 5.5 off 1 on 5.5 off
    He is running almost the opposite.
    Except for the 30mins vs 60in the middle.

    I don't think the k is as important as just having something break up the dark.
    As tty said tho glr does seem to produce more horizontal growth instead of stretch.
    Glr is definitely not a solution for all grow ops but it does have advantages in shorter areas and for those on limited power.
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    torontoke Well-Known Member

    What is a glt schedule?

    pedrovski Well-Known Member

    This lighting schedule mentioned a little earlier in the thread

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    torontoke Well-Known Member

    My mix up it's usually called glr gas light routine so I wasn't sure what the t was for.
    What is it your hoping the 730nm do? Most talk of added initiators are based on flowering not veg from what I've read
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    thccbdhealth Well-Known Member

    Flipped... 11 hours light
    rather then the 12

    Thus was recommended to me by the breeder of one of the strains i was running.
    that one strain is the fire, out of the 4

    It was suggested as a means to keep heat and humidity in check in a sealed environment, in my cenario.

    I did experience flowers setting in on the 8th-10th day.
    Last edited: Sep 30, 2017
    mr. childs

    mr. childs Well-Known Member

    smellier girls than 12/12 ?
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    hillbill Well-Known Member

    Maybe but a lot of smells right now with Space Monkey running long for seed and three Sour Bubble at 6 weeks. Sour Bubbles are very much like each other and short with wide leaves, tight buds and spacing. All are deep green and very frosty. Will not train next time. Reminds me of Hindu Kush. One Sour Bubble had sex with her brother and looks seeded.

    The 10/14 may even be increasing yield while shortening flower time on some strains. Biggest difference beyond this is using something like 15% less electricity. No negatives at my house!
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    Hotwired Well-Known Member

    I have been using this method for 3 years. I don't usually post about what I do because the kids here start shouting and it makes my ears hurt, but I'll make an exception in this post.

    I originally read about this method on this site many years ago. It was posted for people who wanted to save money on electricity. So I decided to give it a shot. I set a tent aside, put some clones in it, and set the timer for 12 hours on, 5.5 off, 1 hour on, and 5.5 off under 450 watts in a 4 x 4. They stretched a bit the first week but once the bigger fan leaves grew in they looked perfectly normal. I kept them in veg for the usual 4 weeks and then put them under a 600 watt hps to flower. They took off quickly and were flowering in a few days. Needless to say I was impressed.

    I then changed my cloning method to the "12/1" schedule as well and they stopped any stretch in the first week of veg. I love how even clones can be trained. Over time I made changes to the flower schedule and shaved an hour off lights on with NO change at all in density, size or strength. The only time I had a problem was with a pure sativa clone. Seemed like she wanted to flower while being cloned and didn't like the light schedule at all. I just cut off the tops and put them under a 16/8 to finish cloning. They vegged fine under the "12/1" method once they had their roots. Otherwise ALL indica and hybrid strains have worked 100% with this method.

    The savings in my bill were very good and made the method all the more worth while for me. It's very hot where I live and the cooling costs alone are enormous. This method works, you lose nothing, and you save on electric.

    All I can say is stop arguing, try out whatever you want, and be happy while doing it. That's all that really matters in the end 8)
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    ttystikk Well-Known Member

    Sounds like it worked great for you!

    I gave up on it in favor of another schedule because it was not giving me the stretch I needed to fill the big vertical trellis panels I was growing on.

    That other schedule was 6 on and 2 off three times a day. It worked very well and helped keep the temperatures and RH levels more even in my veg space.
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    ruwtz Well-Known Member

    I'm trialling 6/2 in veg for the the first time on a current run of Platinum GSC and Ghost OG (OG Kush pheno), the latter of which seems already sluggish in veg but really booms in flower. The GSC has no such issues: seems to love being topped and trained, aggressive rooting and will eat everything I give her.

    Lets see how well they do together under 6/2.
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    rollitup Forum Admin Staff Member






    SonsOfAvery Well-Known Member

    I get it, you're an old school grower and stick to what you know. But you're also a staff member/forum admin, and I don't think this is the best way to conduct yourself to be honest.
    On this thread people are discussing theories and sharing experiences of grow and techniques. This is literally how thing advance, by people trying something new and sharing their results, wether they work or not.
    I understand that you believe it doesn't work, but some people here are saying otherwise. So best we leave it at that and let this thread continue?
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    nxsov180db Well-Known Member

    Maybe he's drunk?
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