[Sdotnoop]

Read this in Soft Secrets, thought was interesting, gonna give a go

Gas Lantern Routine (GLR) – This one was brought to my attention earlier in the year by a mate who runs a shop up North. I’d never heard of it before but a bit of online research brought up plenty of mentions on the usual forums. It’s basically a lighting schedule for the vegetative phase that promises to supercharge your plants with flowering hormones as well as saving almost 50% on your electricity.



For decades now indoor growers have stood by the tried and tested 18/6 lighting schedule for the vegetative period, reducing down to 12/12 for the flowering period. The schedule loosely follows natural lighting patterns where a reduction in daylight hours (after the summer solstice) indicates to the plant that Autumn is on its way and it’s time to reproduce and generate flowers. The GLR is based around the theory that plants only require 13 hours of light to remain in the vegetative phase and that nowhere in nature would a plant receive 18 hours of continuous light – not even equatorial strains. In fact, 18 hours of light actually stresses the plant.



The GLR lighting schedule involves 12 hours of light, 5.5 hours of darkness, a single hour of light and finally another 5.5 hours of darkness. Basically a 12/12 schedule with 1 hour of light inserted into the middle of the dark period to prevent the plants from flowering. The idea is that the prolonged dark periods allow the plant to rest and develop healthier roots, stems and vegetation. The plants are charged with flowering hormones but the single hour of light prevents the plant from flowering, when that hour is removed they explode.



Converts to the GLR absolutely swear by it and state that their plants grow much faster in veg, stretch less when they enter the flowering cycle, show flowering sites far earlier and are generally healthier and less stressed as there isn’t a huge reduction in lighting from veg to flower.



Many users of the GLR also follow our next technique…



Diminishing Light Schedule (DLS) – In nature, the amount of daylight decreases towards the end of the growing season, forcing the plant to produce more flowering hormones and divert more energy into flower production. Rather than set your lighting schedule during the entire flowering period to 12/12 – which is basically the borderline number of hours that will induce flowering – start at 11/13 (light/darkness) and increase the dark period by 30 minutes every two weeks. For example; 2 weeks at 11/13, 2 weeks at 10.5/13.5, 2 weeks at 10/14, 2 weeks at 9.5/14.5 final week at 9/15.



The additional hour of darkness (11/13) at the start of the DLS sends the plant a clear message that the time is right to flower whilst the diminishing light hours throughout the rest of the flowering period will force an increase in production as the plant realises that her end is nigh!



Growers that I spoke to that used the GLR and DLS techniques reported more flower sites, far greater resin production and, subsequently, more weight. Plus, a significant saving in electricity.

[theherbalizor]

I ran this a while back... After about 2 months all my moms went into a weird reveg state... 18/6 for me.

[SB7]

For anyone who stumbles onto GLR as I did...
This isn't new, it's been around for years.
I was interested in saving some energy , so I tried it last year for my moms...
They switched to flowering within 5 days. Although , I suppose reveg might be more accurate, in that they were flowering.. sort off , with no stretch.
I then tried 12/2 no difference. Then 13/2 , no difference. ( So I was basically at 15hr daylight )
Went back to 16/8 ( yes 16/8 ) for my moms , they seemed much healthier and "normal"
These days ( for anything I veg) I'm running 12hr CMH ( I had it laying around) and 440nm ( Royal Blue) LED light bars I made, at night. They show sex but never flower and I save 12 hrs of CMH power. As we speak, I'm running the RB LEDS 24/7 to see if it helps to keep them shorter, as I'm vertically challenged.

This guy chats about his GLR results ... so so..
h__ttps://www.youtube.com/watch?v=HAqIQxX9mWM&list=PLDDD B74B55B09456E&index=14