Putting the nail in the myth: 24/0 vs 18/6

I would have to agree about the posts that indicate a lack of controls
or a way to really measure the results of your experiment.
Howevr it does seem that there is a benefit to the dark
period.
Although I am only on my first grow my research and my personal observations
suggest that the plants seem to benefit from the dark period after the seedling stage.
I also found the coments interesting as well about the the lower foilage growth
and ultimate yeild I am going to keep an eye on that aspect of it.
Good luck to all

time lapse video would be cool

and what about vertical lighting? right now i have all my baby plants in a phototron with 6 vertical 40 flouros and a shelf in the middle,.... my plants receive no light from over head all from the sides,..... and strain has got to have something to do with it too,.. right now the 2 3 oldest are, 2 skunk1's and , 1 north lights,... the skunks have very close nodes, less than a 1/2 inch, while the north lights is more stretched out and taller, like 1.5 inch nodes,..... plus i have a bunch of others in there started at different times,... big buds, and bbl gum started about a week or so ago,.. and ice, and sk1xthai maybe about 3 weeks old,....

if u want to grow, why wouldnt you just stick with how mother nature intended on the lite cycle for plants to be setup? plust 24/0 is pretty ridiculous, why would u ever want ur lite to be going ALL the time? id freak out when im not there, thats why i set it up to where im home when the lite comes on. hands down, 18/6 will outbeat 24/0 anyday of the week, its how nature intended it.

Originally Posted by NeoAnarchist

if u want to grow, why wouldnt you just stick with how mother nature intended on the lite cycle for plants to be setup? plust 24/0 is pretty ridiculous, why would u ever want ur lite to be going ALL the time? id freak out when im not there, thats why i set it up to where im home when the lite comes on. hands down, 18/6 will outbeat 24/0 anyday of the week, its how nature intended it.

IF your rooms are set up properly, there is no need to worry. My T5's have not been shut off in 6-months! No worries there!

Peace

Two indicas, two sativas, NL's and thai ss. Both from same mothers respectively. Two on 18/6 two on 24/0. The 24/0s grew faster. This is a true study not hearsay so listen don't listen but the dark time is not important in the first 2 months at any rate. Want fast do 24/0 want natural do 18/6 but the latter has not shown any advantages and that is that. Or should I do it 800 times to prove to the nuts that this is the best example you can get...

Wow i've never heard so many opinions stated as fact.
As stated, the dark photoperiod will promote growth, but not necesarily nodal formation. 24/0 will keep your plants more compact with an equal amount of budsites.

why would u ever want ur lite to be going ALL the time? id freak out when im not there

As for leaving your lights on for extended periods of time, if your growroom is wired properly than it shouldnt be a problem, if its not, then fuck you, everytime a house with a grow op burns down i shed a tear. If you're honestly not comfortable with having your lights on when you're not home than you probably need to sort your shit out before you can carry on as a marijuana grower. Sorry if that comes off as harsh, but its situations like that that lead to fires, and fires in growrooms make us all look bad.
At the end of the day of course, like most things, it comes down to personal preference.

18/6 will outbeat 24/0 anyday of the week, its how nature intended it.

This is just not necesarily true. And using nature as justification is fucking weak.
Nature wants spider mites to thrive right? Why don't we just introduce those into our growrooms? Or how about we simulate cloudy days by using weaker lights? Maybe simulate a drought or a windstorm every now and then?
I think we can unanimously agree that the sun is the best grow light there is. However theres more to it than that.

Regardless to weather you prefer 24/0 of 18/6 its proven that either way can be successful. Like most things in growing weed, there is no "right" or "wrong" If it works it works, and if it doesn't it doesnt.

Originally Posted by itsgrowinglikeaweed

This will definitly affect eventuall yeild. And that is what we are all MOST interested in. YEILD. Not just height.

Couldn't agree more. With this in mind, I will post a trial by OT1, who knows his shit pretty well. His results show pretty conclusively that 20/4 yielded better than either 18/6 or 24/0.

Originally Posted by Oldtimer1

We did a lot of experiments with light times a few years back using known sat and sat dom clone lines.

With Vegging ie under hid lights.

20/4 produced the most sturdy growth and the most bulk. Best final yield, taken as 100%.
22/2 Less of both. yield 88%
18/6 Studier than 22/2 but slightly less bulk. yield 87%
24/0 Much lighter in all aspects than 18/6. Yield 79%
16/8 The weediest plants. yield 67%

....

For the mum lines we have 20/4 to 12/12 gives the best crop weight and bud quality, really thats all I’m interested in.

Source.