Lowering light intensity at the end of flower

kingzt

Well-Known Member
Does anyone lower the light intensity at the end of flower? Like 1-2 weeks before harvesting. Just curious if there is any benefits maybe progressing the ripening of the buds. I know peeps do it if they're experiencing heat issues but I'm curious if there's benefits in a proper controlled room. Thanks in advance for any advice.
 
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DoubleAtotheRON

Well-Known Member
Awesome! What benefits have you noticed by doing that?
I really don't know.. it just makes sense to me. We get a decent yield at ~110-115g per plant dried and cured, or 1.7ish lbs wet, ready for processors. You can see our 3rd run in the link below. We are a small boutique grower in Oklahoma.
 

TintEastwood

Well-Known Member
I'm learning to NOT vaporize my terps. :dunce: Raising lights/lowering intensity, and lower room temps are helpful from what I'm reading. Still more to study up on.





Fun Fact: Over 200 natural terpenes have been identified in cannabis strains. More than 20,000 terpenes exist in nature.

Evaperation Starting point:

The most volatile terpenes found in the cannabis plant will start to evaporate around 70° F (filling the air with a pungent aroma). Other terpenes will begin to evaporate rapidly around 100° F, although temperatures will vary.

Boiling point:
Many terpenes vaporize near the same temperature as THC (which boils at about 157°C), although some terpenes are more volatile than others and begin to vaporizer at lower temperatures.


 

DoubleAtotheRON

Well-Known Member
I'm learning to NOT vaporize my terps. :dunce: Raising lights/lowering intensity, and lower room temps are helpful from what I'm reading. Still more to study up on.





Fun Fact: Over 200 natural terpenes have been identified in cannabis strains. More than 20,000 terpenes exist in nature.

Evaperation Starting point:

The most volatile terpenes found in the cannabis plant will start to evaporate around 70° F (filling the air with a pungent aroma). Other terpenes will begin to evaporate rapidly around 100° F, although temperatures will vary.

Boiling point:
Many terpenes vaporize near the same temperature as THC (which boils at about 157°C), although some terpenes are more volatile than others and begin to vaporizer at lower temperatures.


Right on!... We start out at around 78 in veg, and like right now, we are 2 weeks to finish, and run the temps at ~70 during lights on , and ~63 during lights off.
 

DoubleAtotheRON

Well-Known Member
I'm learning to NOT vaporize my terps. :dunce: Raising lights/lowering intensity, and lower room temps are helpful from what I'm reading. Still more to study up on.





Fun Fact: Over 200 natural terpenes have been identified in cannabis strains. More than 20,000 terpenes exist in nature.

Evaperation Starting point:

The most volatile terpenes found in the cannabis plant will start to evaporate around 70° F (filling the air with a pungent aroma). Other terpenes will begin to evaporate rapidly around 100° F, although temperatures will vary.

Boiling point:
Many terpenes vaporize near the same temperature as THC (which boils at about 157°C), although some terpenes are more volatile than others and begin to vaporizer at lower temperatures.


Interesting that you said that about the aroma... We've never run temps this low towards the end, and we have noticed that the pungent smell is not near as intense as the first 2 runs we did with higher temps.
 

kingzt

Well-Known Member
I'm learning to NOT vaporize my terps. :dunce: Raising lights/lowering intensity, and lower room temps are helpful from what I'm reading. Still more to study up on.





Fun Fact: Over 200 natural terpenes have been identified in cannabis strains. More than 20,000 terpenes exist in nature.

Evaperation Starting point:

The most volatile terpenes found in the cannabis plant will start to evaporate around 70° F (filling the air with a pungent aroma). Other terpenes will begin to evaporate rapidly around 100° F, although temperatures will vary.

Boiling point:
Many terpenes vaporize near the same temperature as THC (which boils at about 157°C), although some terpenes are more volatile than others and begin to vaporizer at lower temperatures.


I was thinking the same but couldn’t find any hard evidence on it. My thinking was just like drying. Higher drying temps will ruin certain terps.
 

kingzt

Well-Known Member
Interesting that you said that about the aroma... We've never run temps this low towards the end, and we have noticed that the pungent smell is not near as intense as the first 2 runs we did with higher temps.
How high were your temps when you noticed those stronger smells? Something I noticed is that things get stinkier around my rooms is when the lights are on and during the their night schedule.
 

DoubleAtotheRON

Well-Known Member
How high were your temps when you noticed those stronger smells? Something I noticed is that things get stinkier around my rooms is when the lights are on and during the their night schedule.
I’d say closer to upper 70’s , low 80’s throughout.
 

Hempire828

Well-Known Member
I was told to change my bulbs back to blue to increase resin at the same time raise the light to decrease heat.. in the last 2 weeks
 

Hempire828

Well-Known Member
Yeah it does seem counterproductive but if they were outside.. the temps would change..along with the sun setting.. I’m still learning.. will just take note of what’s happening..
 

Kassiopeija

Well-Known Member
That's kinda backwards. Most raise intensity as they go.
That's true. But isn't it the case that Cannabis can only use a say, "specific" amount of light per day because of some of the internal mechanisms of the plant do capsize it? Light will build sugar but if the plant has this plentiful already it may not need anymore and one could cut those electricitiy costs. I don't know... there are so many factors.... as my plants get older they thin out in leafmass they seem to loose a bit on their ability to scoop up the light.
Franktly, isn't there a scientific study available about this topic? That sounds rather important for me. I've read 18/6 & 12/12 is the acceptable always working method generally accepted method... but I'm actually a person that likes to play around with such things..... just to explore the unkown... test out staff and observe. One strain did easily flower under 14h lights so I wondered how would that've been grown in comparison to under 12/12?

That plant hormone that gets buildup during sleep, does that act like when you cross a certain threshold with it, it'll result in flowering grow. I wonder if the amount of this hormone present in a plant makes a difference on a few factors that include the buildup of fruits/flowers. Or will it only have to be over a certain threshold and onset only always the same change under the same strength.
Or ......... begin a drop in light cycle . From 12/12 to 11/13 to 10/14.
Flowers begin finishing a bit faster as it mimics an even shorter day.
hello, what would you do with your lights? maybe move them a little bit more closer to compensate the loss of lighttime? although, from a mimics point of view, it should less strong so I don't know...

I've read on some organics n outdoors that swear on artificial nutritient depletion (mostly targeting N) to speed up the progression of buds, or better: to make it an "Early" (in breeders terms) when that type is not suitable too far north and wouldn't finish. So maybe sun depletion... donno... maybe I'm currently just creating myths :D

and what about different light to get the plant faster into sleep ....
and this "Blue light" some change into MH for the last days.. is this because of the UV emitted more from that MH?
 
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