Zill said:

Hi Cpurola,

That article is not bad. He also references use of 25W reptile UVB bulb.

I grow outside. But if I grew in tents I work definitely be augmenting lighting with UV. It works. Granted, unless you grow an identical strain with out uv as control you may not be able to discern from treated. One good bio assay - smoke a fan leaf. Like I said, helping out in the greenhouse lots of leaves “fell” to floor. Those leaves were as potent as any flower Bud.

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Thanks much!

Zill said:

2water,

Cheese and crackers! This is a great conversation.

One can easily conduct a lit search for effects of the three uv ranges on single cell and complex organisms. It comes down to the light energy capable of causing cell damage and is a resulting mutation product worthy of a becoming a constituent. UVB was selected for the study due to its affect on cells tissue and mutagenic capability.

OG asked if there was a benefit to potency/flavor by irradiating plants with UV. Yes there is. Read the paper.

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I read the paper and plenty others, your read like a high schooler wrote it. If you would like to discuss specifically any of the points I touched on concerning UVA, then great, you negated it and made a baseless blanket statement that UVA is ineffective to photosynthesis, all I asked is where to you get the data to support that argument, and where is your data to prove it?

Cheese and crackers, let make 2Water seem like the aggressive one when you came in here with dismissive comments and negating thing without evidence to support. There is too much attitude around here that "I know everything, grow this way it the way I was taught." Currently in the USA all scientific studies on cannabis are funded almost solely through big pharmaceutical and commercial interests. That is why I asked if you looked at studies from other countries. The reason why they are not studying UVA in the States is because it is not a commercial efficient and cost effective as UVB where the bulbs and duration of use favors UVB. But just so all the lay people get the video I posted, can you discern what Dr Bugbee was showing for us on the graph on the UV spectrum vs UVA and UVB and talk about the intersection where the values are equal?

The reason why I'm so animated is because it benefits noone for a "scientist" to come on here from a position of authority and make blanket statements such as "UVA doesnt do anything" without proof or evidence. To me that is scientifically disingenuous and hurts the community. As I said before, for home applications, UVA would be easier to not fuck up for new growers, specifically those that already come on here measuring distance and changing light intensity based off factory recommendations If you didn't test UVA, say so and then provide where you did get you information from please. Have you read studies performed outside of the US?

2 water,

Now is good time to go away. You really have at best a thin patina of understanding most things but you tend to rag at the mouth.

See ya,
Zill.

Zill said:

2 water,

Now is good time to go away. You really have at best a thin patina of understanding most things but you tend to rag at the mouth.

See ya,
Zill.

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Please tell me what I dont understand by answering my questions.

I asked you about methodology and you referenced only the machinery used, I even gave you an example of what I was referencing. You havent answered or touched on a single point I made, just dismissed me without knowing, that I "only have a thin patina of understanding," so you're a Mensca member too right? Actually I was until I stopped renewing.

I wanted a discussion, you have turned it into a debate, so please go back and negate anything I've said. You are the almighty scientist. Please all wise and powerful one school this insignificant peon of an intellect!

Hey @Zill Instead of attacking me, attack my arguments, you might do better

Even though I'm replying, I'm not looking to insert myself into an argument.

I will say as a UV user, I would like the hard numbers and data.
Without it, how do I know if I'm giving my plant to much or not enough.

That's exactly how I feel about UV, not enough hard data that I can find online so I just run my UV at manufactures specs because I have found no other data.

We all know how manufactures specs can be way off so is my UV even doing anything

Ive used the Solacure 32w Flower Power bulbs, for almost 8 years, with good results. Though, I do believe some strains, are affected more than others. Plants with genetics where there are high levels of UVA/B, would seem logically, most affected.
I sue them from the very start-Seedling Stage. As soon as they come up, they are under the Solacure bulbs.
While some may disagree. I started growing when the very first HID bulbs came into existence. 1977-78 They came from the Navy Nuclear Sub Program, and the Navy used these bulbs to grow veggies, as sometimes they would have zero contact for 9 months. So this gave them fresh food.
They were 1000w Halide. They were also super fragile, and many would not survive shipping, and they gave no guarantee, they would survive shipping. So if it broke in shipping. Tough luck. No Replacement.
But, 6 months later, someone came out with a bulb, named the Supernova, and was warranted for shipping. 1000w Halide.

So, from the very start of HID use, Ive started seedlings under 1000w, though, I have also used a 1000w Hortilux HPS, and 1150w Gavita DE, for starting seeds.
I also used the SHO Fluroescent, before there were HID. I do use Cool white Fluroescent for rooting clones. No UVA/B
I use 2 of the Solacure bulbs, for evey 1000w HID, or Equal, in a 4 x 4 foot area. They are 24 inches from the canopy, farther if DE HID, 40in, and run higher output, and longer duration.
They get 4 hours per day. Ive seen the pulse method too, but do use it, but not against it. I veg 24/0, and every 3 days lights out 4 hours.
The Solacure bulb, while full spectrum UVA/B, has Most of its power in the 280nm- I believe its around 305nm. It takes very expensive glass, to transmit this light frequency efficiently. The Solacure is the most effective at activating the RVBR8 receptor, as this is where the SC, is most powerful. The SC, is also overbuilt, and can be run as high as 80w, but is rated 32w. The 32w Solacure is 10x+ more powerful than the Arcadia Desert Dragon 54w bulb. Which I believe is the most powerful Reptile Bulb.
It also takes UVB, to generate Vitamin D.
The Argomax is probably the next most powerful vs Solacure. Solacure is also T12, and is much larger diameter, than any other UVA/B bulb. Also has a built in reflector, on the INSIDE, of the bulb. UVA/B, cannot be reflected by a standard reflector. The SC, has a special coating on the inside of the bulb, that efficiently reflects the UVA/B.

From what Ive gathered, UVA, is Very Beneficial in the aid of Photosynthesis, and this has been known, for years. I also believe UVA, helps protect against high levels of UVB,

ScienceDirect
https://www.sciencedirect.com/science/article/pii/S016894521630810X

UV-A radiation effects on higher plants: Exploring the known …​

Feb 1, 2017 · UV-A radiation can also enhance photosynthesis through induced protection of the photosynthetic apparatus under abiotic stress conditions (such as high UV-B levels, drought or …


ASM Journals
https://journals.asm.org/doi/10.1128/a…

UV-A radiation increases biomass yield by enhancing …​

In this study, we investigated the effects of UV-A radiation on the growth, photosynthetic ability, and metabolome of the edible cyanobacterium Nostoc

I was hoping for some hard data as well, I am a passionate guy....... so, sorry @OgBoogs730 , didnt mean to derail my scientific questions on UVA to the resident scientist