Switch from 18-6 to 12-12 to finish Autos?
- Thread starter GoatSoup
- Start date
twentyeight.threefive
Well-Known Member
Could you post a link to your fact?
Masterdank420
Well-Known Member
Sorry I was wrong its 22 hours a day although the sky doesn't get dark.
Much of northern Russia is blanketed in sunlight nearly 24 hours a day for 2 months — here's what the phenomenon looks like at every hour
Every June, St. Petersburg, Russia, is so far north that it experiences near 24-hour sunlight from mid-May to mid-July during the "White Nights."
www.businessinsider.com
Masterdank420
Well-Known Member
Im almost in the same boat, last frost at end of may to start of june and first frost September. It's hard to get to the end with something that isn't rotten or frost burned lol. This year i hauled em inside to finish cause it wouldn't stop raining and temps dropped to 10 degrees at night only went up to 14 in the day.
twentyeight.threefive
Well-Known Member
St. Petersburg isn't in Siberia?Sorry I was wrong its 22 hours a day although the sky doesn't get dark.
Much of northern Russia is blanketed in sunlight nearly 24 hours a day for 2 months — here's what the phenomenon looks like at every hour
Every June, St. Petersburg, Russia, is so far north that it experiences near 24-hour sunlight from mid-May to mid-July during the "White Nights."
Masterdank420
Well-Known Member
Hahaha i read it wrong man. Fuck lol
its Northern siberia that has days with No dark sky, it's so huge that the southern parts actually do get periods of dark. Pretty cool.
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twentyeight.threefive
Well-Known Member
Cannabis Ruderalis was first identified by botanist Janischewski near the Volga River. That area experiences a maximum of just under 17.5 hrs of daylight.
Masterdank420
Well-Known Member
So 18-6 is fine.. i been wasting so much power lmao....
twentyeight.threefive
Well-Known Member
I grow my autoflowers on 18/6. As long as you aren't exceeding the maximum DLI for the plant you can run 24/0.So 18-6 is fine.. i been wasting so much power lmao....
Higher power lights (PPFD) can hit the maximum DLI in less time allowing you to run shorter daylight schedules.
Masterdank420
Well-Known Member
Ive got 900w of high intensity led going lmao how do i figure out the numbers?
twentyeight.threefive
Well-Known Member
What kind of light is it? Is it actually pulling 900w from the wall?
Masterdank420
Well-Known Member
I got 3 mars hydro tsl 2000 all hooked up covering an area 4x4. They pull 300w from the wall each.
LeastExpectedGrower
Well-Known Member
I'm running 18/6 with autos. Before I had sufficient lighting I was doing 20/4, but I subscribe to the school of paying attention to DLI. I'm probably running a bit 'hotter' on that than I need to, somewhere in the 45-50DLI range in flower, but it's in my nature. The plants don't seem to mind. My tent is only about 14 square feet and I'm running 675w of HLG units (but dimmed down a bit).
For all the 'plants may get 24 hours of light' in a place that very few of us will ever grow; I don't think you want to reduce the equation to JUST number of hours. Sure there may be 'not darkness' in some seasons for places like Siberia but that doesn't mean that for a number of hours there's the substantial PPFD that really count for much.
For all the 'plants may get 24 hours of light' in a place that very few of us will ever grow; I don't think you want to reduce the equation to JUST number of hours. Sure there may be 'not darkness' in some seasons for places like Siberia but that doesn't mean that for a number of hours there's the substantial PPFD that really count for much.
Autodoctor
Well-Known Member
it’s only 3695 km away though
twentyeight.threefive
Well-Known Member
Seems like one too many lights, at least for veg.
The Mars Hydro TSL 2000 has a maximum PPFD of 997 µmol/m² and an average PPFD of 727 µmol/m².
Maximum DLI will vary from strain to strain and even phenotypes.
From what I've read veg DLI around 20-35 and flower about 40-65.
If you assume an average of 727 µmol/m² across your grow you should run your lights at 70% to achieve 33 DLI.
In flower 727 µmol/m² will give you about 31.5 DLI over 12 hrs.
There are a lot of variables, but knowing your actual PPFD values would be required for true numbers.
DLI Calculator
Masterdank420
Well-Known Member
Only? Lmao
Masterdank420
Well-Known Member
Thanks man, I dont use those lights in veg, too potent lmao. I use crappy cheap wish.com "10,000watt light For that lmao .I'll get my buddy over with his fancy gadgets for measuring light and ill figure it out from there lol.
Frank Nitty
Well-Known Member
Now that is something that I needed to know! I'll go to 18-6 in my big light tent from here on out.
LeastExpectedGrower
Well-Known Member
You can play around with the numbers a bit...Last cycle I ran 17/7 schedule without a problem, and you could probably even do a 16/8 and have it work...just a matter of figuring out what your PPFD is and calculating the DLI and making sure you're providing that DLI across a day.
Frank Nitty
Well-Known Member
I have a Spider Farmer SE5000 crammed into a 3x3x6! 24/7 with the light at max. Should I change my light cycle?