has anyone done 13 dark and 11 light in the last few weeks of flowering?

and if so do you notice any difference?

growing auto's as a past time, aside from the the bigger garden, after a few ideas I didn't go as far as 13 dark 11 light...but 48 hours of darkness, and I saw a NOTICEABLE difference! I would love to see the development after 13/11 though!

I am currently flowering under 14 hours of darkness and 10 hours of light and have been doing so for almost 2 weeks. The flowering has become very aggressive; I literally notice even small bits of weight on my girl each day for about the past 5 days. I have about another 3 - 4 weeks to go and this is the first time I've ever done this so ... we'll see how it goes. I originally started at 12/12 though and ran that for several weeks under T5 fluorescent lights. Once I decided to go ahead and hook up my 400 watt HPS 'cause the flowering was going slow, I threw my girl into 11/13 for about 1 1/2 weeks, and then into 10/14. I've read about putting her in 9/15 for the final week but have not decided whether I'm going to or not.

Peace and happy growing!

There is no reason, other then experimenting and learning it doesn't work, to do anything but 12/12 for flowering. Same can be said about the nonsense of doing 48-72 hours of darkness at harvest.

All of these "tricks" have already been proven nonsense by myself and many others before me. 18/6 veg, 12/12 flower. Simple.

We did both reducing(bring 600 hps lights down to 300-400) and adding more light(switching 600s to 1000s) the last few weeks. We've done 48-72 hours of darkness. We've done different flowering and veg light schedules. We've done some other silly things as well just to try it, and none helped produce more bud or resin. As a matter of fact most experiments had negative results.