Moe.Red
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Correct,
i get the same thing.
So density is irrelevant except for smoker appeal, right?
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Correct,25% would be 250mg per gram. 20% would be 200mg per gram
Yeah... pretty much. But there is a lot of hype around color and density so I'd say it has a fair bit of impact on perception.Correct,
i get the same thing.
So density is irrelevant except for smoker appeal, right?
Sexy.Meanwhile...
I am running UVA bars in my LED tent. I have grown over a dozen Durban Poison, and this is the first I have ever seen them go purple.
Now the question on the Purple Kush getting purple under the Flower Powers, perhaps it's UVA that does that since I'm getting it on this Durban too.Yeah... pretty much. But there is a lot of hype around color and density so I'd say it has a fair bit of impact on perception.
Yeah I don't think it will either. Interesting though because anthocyanin is more present where less photosynthesis is occurring and higher stability in lower temps as they usually don't do as well over 70-75fNow the question on the Purple Kush getting purple under the Flower Powers, perhaps it's UVA that does that since I'm getting it on this Durban too.
Too many variables for sure, but If I could get the colors without impacting yield out of just UVA, that would be interesting to know. I don't think the UVA harmed the plants in any way.
View attachment 1117615
It's only really dark on the small buds on the sides.Yeah I don't think it will either. Interesting though because anthocyanin is more present where less photosynthesis is occurring and higher stability in lower temps as they usually don't do as well over 70-75f
Wait, I just thought of something. The Purples that are dark in the UV test tent are also on the same side as the AC unit. They pretty much get the majority of the first air that comes out of the AC. It's possible the lower temp is a requirement and UV has nothing to do with it.Yeah I don't think it will either. Interesting though because anthocyanin is more present where less photosynthesis is occurring and higher stability in lower temps as they usually don't do as well over 70-75f
I think you are right and this is a UV response.Just to note. Many strains i and others have grown under Phillips 315 cmh turned purple and some strains finished about a week earlier than when grown under hps.
I think you are right and this is a UV response.
But in reading up on
Anthocyanin
The darker colors can also aid in temp protection for the plant.
Based on less than all the facts my gut tells me UVA is the primary driver of purple in these plants. The other half the tent is Far Red. Nothing interesting to report there.
We have 4 foot F32T8 UVA bulbs, centered on 366nm, no UVB just the single phosphor, if you ever got curious. Runs the same fixture as Flower Power. I'm overstocked on them, as they were designed for wood finishing and got superseded by the SG series (the parent of the Flower Power), which is better for that purpose. Can sell them cheap, like 10 dollars if someone buys a few. Good lamp with the built in reflector, called the "Curall 365". I've been trying to find a hemp grower to do some tests (free to them) as my theory is that if you take already dried and cured buds and expose them to lots of this frequency, you convert THC -> CBN, which is unregulated and can take hemp that is over the THC limit and push it down. That's the theory, anyway. 365-366 is the center band where oxidation is accelerated, be it tanning skin or catalytic reactions in many UV finishes.I think you are right and this is a UV response.
But in reading up on
Anthocyanin
The darker colors can also aid in temp protection for the plant.
Based on less than all the facts my gut tells me UVA is the primary driver of purple in these plants. The other half the tent is Far Red. Nothing interesting to report there.
I’m thinking I might take you up on those cheap uva bulbs for my next run of THC Victory. This is a supposed high THCV strain that were really expensive so no UVB on the first run of these. But I can compare left vs right side of tent.We have 4 foot F32T8 UVA bulbs, centered on 366nm, no UVB just the single phosphor, if you ever got curious. Runs the same fixture as Flower Power. I'm overstocked on them, as they were designed for wood finishing and got superseded by the SG series (the parent of the Flower Power), which is better for that purpose. Can sell them cheap, like 10 dollars if someone buys a few. Good lamp with the built in reflector, called the "Curall 365". I've been trying to find a hemp grower to do some tests (free to them) as my theory is that if you take already dried and cured buds and expose them to lots of this frequency, you convert THC -> CBN, which is unregulated and can take hemp that is over the THC limit and push it down. That's the theory, anyway. 365-366 is the center band where oxidation is accelerated, be it tanning skin or catalytic reactions in many UV finishes.
This is in the LED tent on the Durban Poison that was showing purple. Look how the purple goes away on the petiole where a sugar leaf is blocking the UVA from above:
View attachment 1118493
The only purple in this whole tent is on the top where UVA is hitting it directly. I'm only running 4 hours a day, I think if I bumped that up to 8 or 10 it would add a lot more color. If that's important to you. Not sure if it is to me, but it's still cool to learn how to steer your plants a specific way with a little forethought. Durban is not known for being purple.
Taken in conjunction with flowers going purple (posted before) and only under UVA, not to mention how many times I have grown this strain out, I don't think I am.You may be overthinking this. Petioles look like that all the time as nutrients are moving out of the leaves to go where needed.
One of the things a lot of manufacturers don't like to admit is what they don't know. Way back 20 years ago, we made the decision to use only UVA to "water down" our UVB lamps, ie: to make them less than a dangerous 100% UVB lamp. My gut told me that UVA plays a roll, and we are slowly learning that it does, but it is different frequencies that do different things. It's kind of why we did so many prototypes with the Flower Power. I wanted it to hit everything between 280-380nm. Over 380 is fine, we just didn't design for it. Most UV lamps, for any purpose, don't do that, they have deep troughs in the spectrum with only peaks at the main phosphor points. Getting those middle frequencies requires either using multiple phosphors for those points (problematic for a number of reasons, including cost and life) or blending in a ratio that gives you a lot of harmonics in the right places, which is what we did. We didn't start out with the goal of 34%, we just landed there. My first impression back then was to hit 25% UVB which would have worked, but the spectrum missed some of those fat curves, it wasn't as "pretty". So we kept mixing phosphors until we had a lamp that hits all the real UV points, in anticipation that those points would be found to be useful later on. ie: We wanted a *real* full spectrum UV bulb.I’m thinking I might take you up on those cheap uva bulbs for my next run of THC Victory. This is a supposed high THCV strain that were really expensive so no UVB on the first run of these. But I can compare left vs right side of tent.
I currently feel UVA is the spectrum that has the potential to do the most good. This side by side also has the potential of testing minor cannabinoid response carefully. Shooting for South Africa
Very interesting to learn the engineering side of what goes into this. In my real life I used to be a color theory expert in the printing industry. There are a lot of similarities in the complexity of mixing colors for an image to what you are doing.One of the things a lot of manufacturers don't like to admit is what they don't know. Way back 20 years ago, we made the decision to use only UVA to "water down" our UVB lamps, ie: to make them less than a dangerous 100% UVB lamp. My gut told me that UVA plays a roll, and we are slowly learning that it does, but it is different frequencies that do different things. It's kind of why we did so many prototypes with the Flower Power. I wanted it to hit everything between 280-380nm. Over 380 is fine, we just didn't design for it. Most UV lamps, for any purpose, don't do that, they have deep troughs in the spectrum with only peaks at the main phosphor points. Getting those middle frequencies requires either using multiple phosphors for those points (problematic for a number of reasons, including cost and life) or blending in a ratio that gives you a lot of harmonics in the right places, which is what we did. We didn't start out with the goal of 34%, we just landed there. My first impression back then was to hit 25% UVB which would have worked, but the spectrum missed some of those fat curves, it wasn't as "pretty". So we kept mixing phosphors until we had a lamp that hits all the real UV points, in anticipation that those points would be found to be useful later on. ie: We wanted a *real* full spectrum UV bulb.
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