24 hr. lighting versus 18 hr. lighting

**M Blaze** · 02-14-2009, 05:49 PM

If the study suggests theres not much difference between them then why bother using a 24hr cycle?

**misanthropeaic** · 02-14-2009, 05:55 PM

Thanks dude. That is exactly the response i was looking for. I would appreciate it if you could point me in the direction of those studies. Thank You

**misanthropeaic** · 02-14-2009, 06:00 PM

Exactly, if studies show then there is no need for 24. However he said a study shows that out of all 24, 18/6 and 20/4 faired better. I would still like to know where those studies could be found.

**lampshade** · 02-14-2009, 06:02 PM

Originally Posted by misanthropeaic

Exactly, if studies show then there is no need for 24. However he said a study shows that out of all 24, 18/6 and 20/4 faired better. I would still like to know where those studies could be found.

Im looking hard.....

**misanthropeaic** · 02-14-2009, 06:08 PM

Your hard work is greatly appreciated.

**lampshade** · 02-14-2009, 06:39 PM

Im really having trouble, i KNOW i read this somewhere...
Here is a bit of anecdotal evidence: VEG STAGE, LIGHTS: 18/6 ok. whatabout 20/4???

Also Ed Rosenthal Seems to think that seedling will grow 33% faster in 24/0 than 18/6... So im not gonna go by his opinion, thats too big of a difference to be logical.

Thats like saying todays pot is 25% thc..... really... trichromes are the only thing that contain thc and thats not even close to a quarter of the plants dry weight.

**lampshade** · 02-14-2009, 06:42 PM

Im going to assume this... currently we just dont have the scientific information to back up any of these claims, only anecdotal evidence.

Now cannabis is a c3 plant so it does not NEED a dark period. For sugar production that is. However how many other process are there tha we dont know about that go on at night. Saying that i would only assume that something between 18/6 and 24/0 would be best.

Also at night plants arnt absorbing energy so they put all effort into growing up and out. During the day they process and collect energy. So a brief night period would seem to give them a little boost.

**misanthropeaic** · 02-14-2009, 06:53 PM

Thanks for the effort. Even though you couldn't find the studies, i still found your information and logic to be quite helpful. I'm sure i will come across those studies myself sometime. Once again thank you for your time and effort.

**Realclosetgreenz** · 02-14-2009, 06:53 PM

Originally Posted by lampshade

Cannabis is a c3 plant, meaning it does not need a period of rest at night. There was a study (ill try to find it) that compared 18/6, 20/4, and 24/0. there was not much of a difference in the 24/0 and the 18/6, the one that did slightly better was the 20/4.

Yes ive found 20/4 to be the best

**lampshade** · 02-14-2009, 06:55 PM

Your very welcome, i just want to help. If i come across them myself i will pm them to you. But im still gonna go with my gut and say 20/4 is my personal best. Lamp.