Should I add UVB Light?

Moe.Red · Mar 23, 2021

Aqua Man said:
What's the brand and wattage again?

Should I add UVB Light?

Here is the testing setup: And here are the bulbs: All that's left is to figure out when the last 2 weeks are in this tent, and when and for how long to run them.

www.thcfarmer.com

Wattage is 40 per tube, but I have UVA and UVB light meters, which is really what we want to focus on I think.

I'm OK with buying new bulbs for this test, we just need to do it really soon.

Aqua Man · Mar 23, 2021

Moe.Red said:
Should I add UVB Light?

Here is the testing setup: And here are the bulbs: All that's left is to figure out when the last 2 weeks are in this tent, and when and for how long to run them.

www.thcfarmer.com

Wattage is 40 per tube, but I have UVA and UVB light meters, which is really what we want to focus on I think.

I'm OK with buying new bulbs for this test, we just need to do it really soon.

Have a link to the bulbs? So I can see the ratios

Milson · Mar 23, 2021

Really cool interview w solacure founder!

Industry Insider: Dennis Brown - Hydromag

Solacure’s UV light, The Flower Power, is a broadband UV bulb producing UVA and UVB light. Their lights have been show to bridge the gap in quality between garden grown tomatoes and those grown indoors, out of season. We caught up with Dennis Brown to give some insight into Solacure and the work...

hydromag.co.uk

UVR8 - Wikipedia

en.wikipedia.org

The purdue paper

Milsonmilson.me

Moe.Red · Mar 23, 2021

Aqua Man said:
Have a link to the bulbs? So I can see the ratios

Yes the bulbs are in the link I provided

Aqua Man · Mar 23, 2021

Moe.Red said:
Yes the bulbs are in the link I provided

Start 2-4 hrs at 12-24".

Milson · Mar 23, 2021

Milson said:
Really cool interview w solacure founder!

Industry Insider: Dennis Brown - Hydromag

Solacure’s UV light, The Flower Power, is a broadband UV bulb producing UVA and UVB light. Their lights have been show to bridge the gap in quality between garden grown tomatoes and those grown indoors, out of season. We caught up with Dennis Brown to give some insight into Solacure and the work...

hydromag.co.uk

View attachment 1105720

UVR8 - Wikipedia

en.wikipedia.org

View attachment 1105721

The purdue paper

Milsonmilson.me

Here is an awesome, free paper on how this works. What a gold mine! Several awesome graphics. I need to get to a computer to sit down and summarize but i learned more from this than i have learned from the rest of my research combined re: uvb.

https://doi.org/10.1111/pce.12934

Moe.Red · Mar 23, 2021

Seems... unsatisfying. Range in distance and time is massive. 12" at 4 hours is probably 20X more photons than 2 hours at 24, maybe more. There has got to be an equation for that.

Also, my bulbs do not measure the same, and they are different depending on what part of the bulb you measure.

I just ordered 2 new bulbs because these are old and used. Hopefully I will get more consistent readings with new bulbs, and that can help determine the testing parameters.

Moe.Red · Mar 23, 2021

Milson said:
https://doi.org/10.1111/pce.12934

Holy crap, I just learned I don't have a clue. They are even using UVB on cotyledons. The whole last 2 weeks of flower comes seriously under question based on that paper.

I need to step back from this a minute and look at the big picture. Within this UV testing there are about a billion variables.

Milson · Mar 23, 2021

Milson said:
Here is an awesome, free paper on how this works. What a gold mine! Several awesome graphics. I need to get to a computer to sit down and summarize but i learned more from this than i have learned from the rest of my research combined re: uvb.

https://doi.org/10.1111/pce.12934

Here is my attempt to show how i am thinking about it. Sorry about the childish handwriting...i will edit with typed captions lol.

Domon8n30 · Mar 23, 2021

Look guys cannabis plans have a very specific way of defending themselves against UV rays they build trichromes to block the, kind of like we use sunscreen. So by adding UV to your grow, or like most LEDs come with UV these days the plants grow more trichomes to keep themselves from burning. It's as simple as that look it up...

Moe.Red · Mar 23, 2021

Domon8n30 said:
Look guys cannabis plans have a very specific way of defending themselves against UV rays they build trichromes to block the, kind of like we use sunscreen. So by adding UV to your grow, or like most LEDs come with UV these days the plants grow more trichomes to keep themselves from burning. It's as simple as that look it up...

Your post is misleading at best, and flat out wrong at worst.

We don't do bro science here.

Domon8n30 · Mar 23, 2021

So this is wrong...

Domon8n30 · Mar 23, 2021

Yeah they also build them for insects and other things but it's basically a defense mechanism...

Moe.Red · Mar 23, 2021

Milson said:
View attachment 1105797 View attachment 1105798

Here is my attempt to show how i am thinking about it. Sorry about the childish handwriting...i will edit with typed captions lol.

You have very eloquently stated what the jumble in my head is trying to reduce to simple terms.

I think this will lead to a series of tests to really get usable info.

Moe.Red · Mar 23, 2021

Domon8n30 said:
So this is wrong...

Not wrong, just inadequate and incomplete. First of all UV WHAT?

FWIW, I can build a blog post that says anything I damn well please (especially if I am selling something), link to it, and claim argument victory? Nope, show me science, not stuff written to such a basic level they don't even distinguish between the spectrums of UV which have VASTLY different effects on the plant.

Nobody is saying we know everything here, except maybe you?

One primary benefit of science is to be able to predict outcomes. This is what we are working towards here.

Sorry if I pissed you off with the bro science comment, just trying to hold this discussion to a higher level.

Domon8n30 · Mar 23, 2021

Well my grow lights just have UV and I have definitely seen an increase in trichome production since I've started using the lights that have UV included...

Domon8n30 · Mar 23, 2021

Moe.Red said:
Not wrong, just inadequate and incomplete. First of all UV WHAT?

FWIW, I can build a blog post that says anything I damn well please (especially if I am selling something), link to it, and claim argument victory? Nope, show me science, not stuff written to such a basic level they don't even distinguish between the spectrums of UV which have VASTLY different effects on the plant.

Nobody is saying we know everything here, except maybe you?

One primary benefit of science is to be able to predict outcomes. This is what we are working towards here.

Sorry if I pissed you off with the bro science comment, just trying to hold this discussion to a higher level.

Lol didn't piss me off just wanted to show that I wasn't wrong...

Domon8n30 · Mar 23, 2021

You're right Bill Nye the science Guy this is your thread I'm sorry....

Moe.Red · Mar 23, 2021

Domon8n30 said:
Well my grow lights just have UV and I have definitely seen an increase in trichome production since I've started using the lights that have UV included...

OK sir, let me try to see if we can close this gap between us.

I ask you again, how do you measure this? Visually? Explain your controls in place to see the same plant with and without UV (again UV WHAT) and how you compared them. If visually, please post your pics so we can understand. Closest thing we have to a peer review process.

Second, assuming you can prove added trichomes, how does that relate to cannabinoid content? Terpenes? Please show your test results.

Third, what are the spectrums, amounts / intensity, and the DLI you are running on the UV?

Lets start there and see where this goes.

Your buddy Bill.

Domon8n30 · Mar 23, 2021

I'm definitely no scientist just a stoner who likes to grow better Bud each time...
Your basic bro.

Should I add UVB Light?

Should I add UVB Light?

Moe.Red