Watts per sq ft. How many watts in your grow space

[pop22]

The problem is we don't have a DLI recommendation provided by science. Any figure you see attributed to cannabis is somebody's guesswork, usually based on DLI recommended for tomatoes.

Also there is no science saying ruderalis can use 24/7 of light. A recent study of cannabis says they the plants DO need a rest period, i don't remember i=f they stated what length of time was best. I've gone from 24/7 to 20/4 and have seen about a 10% increase in harvest for my autos. Having just started this, I've only one grow's worth of data so it doesn't mean a lot yet. I'm about to harvest the second crop so we'll see what the data is this time. I try to keep all other parameters the same, same strain, medium, nutrient, the same lights and the same tent. I'd like to see others testing this.

If we consider DLI then there has to be a point of saturation where a 18/6 is enough light.

 

[LazyNhazy]

The problem is we don't have a DLI recommendation provided by science. Any figure you see attributed to cannabis is somebody's guesswork, usually based on DLI recommended for tomatoes.

Also there is no science saying ruderalis can use 24/7 of light. A recent study of cannabis says they the plants DO need a rest period, i don't remember i=f they stated what length of time was best. I've gone from 24/7 to 20/4 and have seen about a 10% increase in harvest for my autos. Having just started this, I've only one grow's worth of data so it doesn't mean a lot yet. I'm about to harvest the second crop so we'll see what the data is this time. I try to keep all other parameters the same, same strain, medium, nutrient, the same lights and the same tent. I'd like to see others testing this.

Tag me in, if you are Journaling this?

 

[pop22]

Not the current grow. I was getting slack with my journaling so took some time off from it. I will the next grow.

Tag me in, if you are Journaling this?

 

[Blu_tri]

This lady was grown under 6 autocobs, so about 350 watts. 10+ in 63 days. I got a foxtail mess. Yes it was huge, but bud looked like crap once dried and cured. That’s a roll of paper towels. I wish I had the feed regimen that I use now. In the last pics I used only 250 ppm of feed the entire cycle. My tap is 120-130 ppm. Girls were only getting 120-130 ppm of Nutes. Lady’s grew more efficiently and required much less feed. Buds were hard as a rock with a much better structure. The smoke and smell... well it was just like taking a breath of fresh air. The bud can still be smelled through a 4 mill Mylar bag. Evolve or become extinct.

 

[iampepe]

DIY cobs
18.75 600/32
13.75 440/32

18.75 has better results, tighter buds. More stretch in the 13.75 tent.

 

[Disburped]

The problem is we don't have a DLI recommendation provided by science. Any figure you see attributed to cannabis is somebody's guesswork, usually based on DLI recommended for tomatoes.

Also there is no science saying ruderalis can use 24/7 of light. A recent study of cannabis says they the plants DO need a rest period, i don't remember i=f they stated what length of time was best. I've gone from 24/7 to 20/4 and have seen about a 10% increase in harvest for my autos. Having just started this, I've only one grow's worth of data so it doesn't mean a lot yet. I'm about to harvest the second crop so we'll see what the data is this time. I try to keep all other parameters the same, same strain, medium, nutrient, the same lights and the same tent. I'd like to see others testing this.

Ofcourse it can use light 24/7, science support it cause it is a C3 plant and C3 plants don't need a dark period. So dark period=nonsense. Dim period would the right terminology cause light intensity change processes in plants. That is it, C3 plants don't need darkness.
So by limiting the intensity to zero the overall daily processes of the plants will be different but light is not the only one that change processes, you could try humid period and dry period also, it would make a difference in plant process too but do the plant need a daily humid period?
I have also seen changes in photoperiod plants by reducing light intensity a few hours by shutting off the lights, some strains do like that but they may also like it cold, humid, less nutrients and so on.

 

[pop22]

Yes, C3 plants can maintain photo synthesis 24/7. the fact that they can does not prove that 24/7 is the best way to grow however and there is a lot more going on within the plant than just photosynthesis. I'll spend the time to find again, a study done in Russia about 2-3 years ago that indicated a period of darkness was beneficial to cannabis plants. When i find it, I'll post the link. In the mean time, we all can find 50 sites that agree and 50 that don't... its an ongoing debate. Also, nothing I've read on the Calvin Cycle or C3 plants indicates one way or the other what an optimal photoperiod is.

Ofcourse it can use light 24/7, science support it cause it is a C3 plant and C3 plants don't need a dark period. So dark period=nonsense. Dim period would the right terminology cause light intensity change processes in plants. That is it, C3 plants don't need darkness.
So by limiting the intensity to zero the overall daily processes of the plants will be different but light is not the only one that change processes, you could try humid period and dry period also, it would make a difference in plant process too but do the plant need a daily humid period?
I have also seen changes in photoperiod plants by reducing light intensity a few hours by shutting off the lights, some strains do like that but they may also like it cold, humid, less nutrients and so on.

 

[Blu_tri]

Yes, C3 plants can maintain photo synthesis 24/7. the fact that they can does not prove that 24/7 is the best way to grow however and there is a lot more going on within the plant than just photosynthesis. I'll spend the time to find again, a study done in Russia about 2-3 years ago that indicated a period of darkness was beneficial to cannabis plants. When i find it, I'll post the link. In the mean time, we all can find 50 sites that agree and 50 that don't... its an ongoing debate. Also, nothing I've read on the Calvin Cycle or C3 plants indicates one way or the other what an optimal photoperiod is.

Autos have the best of both The autoflower as we know it can survive in both conditions. light or dark. No the auto in it doesn’t need darkness. But the photo in it enjoys dark time. Either way the auto is just as happy. I agree with the guy above that said we are bombarding them with too much light. Under 24 hours of light.... the amount of light needed is greatly reduced. Having ruderalis in the gene pool make it possible for auto to thrive in low light conditions. On the other hand the photo wants all the light it can get . Autoflower are an abomination. They are defying all rational thought. They are doing things that people never thought they could do. Their efficiency is unreal. Ruderalis survive in a places with barely any light, cold temps and very little to eat. All these characteristics were transferred to the photo period when crossed with the ruderalis. A true hybrid was formed and we as growers are witnessing a complete transformation in the cannabis world. Evolve or become extinct.

 

[Dabber]

 

[SOOTDAWG]

I need to go through all my links I’m on my phone and at school and not on my computer but here’s one that is in my favo pages....

The Light Cycle Debate

Here i will be discussing how different light cycles are beneficial or harmful for cannabis cultivation. Providing current research and understandi...

www.cocoforcannabis.com