How Ultraviolet light affects plants - Bruce Bugbee

[Treetrunk]

Nice video explaining how UV affects plants by the great Bruce Bugbee. You may of seen these UVA LED boards being sold by a few manufacturers like Invisible Sun. This video sheds some light on the subject.

[Treetrunk]

I'm using a uvb fluorescent light at the moment.
You can soon fry the plants is you get trigger happy like I did
Apart from that incident I'm impressed with the results.

[FX]

Thanks, interesting vid

[seymore_budz]

I'm using a uvb fluorescent light at the moment.
You can soon fry the plants is you get trigger happy like I did
Apart from that incident I'm impressed with the results.

Hey @Treetrunk,

I'm about to run a little experiment with some CFL UVB reptile bulbs. Can I ask how much light you running and what seems to be the threshold? Any information gratefully received.

[MrNice]

I'm using a uvb fluorescent light at the moment.
You can soon fry the plants is you get trigger happy like I did
Apart from that incident I'm impressed with the results.

Hey @Treetrunk,

I'm about to run a little experiment with some CFL UVB reptile bulbs. Can I ask how much light you running and what seems to be the threshold? Any information gratefully received.

Yo brother seymore last grow i ran a UVB reptile lamp ZooMed 10.0UVB tube for 3 hrs a day plant was fooked so not sure if it did any think...lol
The next grow may run for a longer time in flower only need to sort out me base nutes keep running in to N problems and Calmag issues
so will see how you get on mate......me pull up a chair for this one.....

[Treetrunk]

I'm using a uvb fluorescent light at the moment.
You can soon fry the plants is you get trigger happy like I did
Apart from that incident I'm impressed with the results.

Hey [mention]Treetrunk[/mention],

I'm about to run a little experiment with some CFL UVB reptile bulbs. Can I ask how much light you running and what seems to be the threshold? Any information gratefully received.

https://www.migrolight.com/product/migro-uvb-310/
This is the light I'm using.
They kick out a bit more than a reptile lamp.
I use it for the last 3 weeks of flowering. On for 2 hours mid light cycle.
Happy with it so far.
Agromax do a T5 bulb that's supposed to be good.
Whatever you choose don't use plastic coated reflector's as they absorb the UV.

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[seymore_budz]

Awesome guys, I have 4 X CFLs. They are kind of lower powered but I only need a little from what I understand. I have 2 X medium ones and 2 X high power ones. Here is the data from the medium potency ones. I'm picking up the higher output ones tomorrow.

[Treetrunk]

This is the difference.


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[Captain Beefheart]

Rite o I got a UV bulb / strip.....rbh6i lit it up and looked at it it made my feel sick as fuk for an hr it so ....I won't look at it again ever anyway I'll be hanging it in the chamber in a few weeks time

great googly moogly!

[Egzoset]

Salutations,

Although i do appreciate the YouTube entries of Bruce Bugbee i'm increasingly less present on-line, so there's a lot that won't fill the hobby time anymore, unfortunately. In days before home-growing got further criminalized in my canuck province the Ultra-Violet subject would have made me read & watch all of it, with special curiosity evoked by IPM concepts meant to deter infestation by nuisible insects as "The Borg". The reasoning was that such little critters would possibly avoid UVA in fear of the more harmful UVB... In any case i did acquire 1 reptile bulb but never went as far as to reach firm conclusions, except i'd want to "chop UVB light periods" to implement "Pulse" mode exposure via timer, to prevent hurting vegetal life and yet simultaneously render my cultivation space even less inviting to parasites. But that was in another life.

Good day, have fun!!

[Egzoset]

This is the difference.


Sent from my moto g(8) power using Tapatalk

AHH yes that's a beast. I'm returning the 5.0 bulbs in favour of two more 10.0 bulbs. I only want a small amount of UVB though. That thing would give you a tan pretty quickly

Rite o I got a UV bulb / strip.....rbh6i lit it up and looked at it it made my feel sick as fuk for an hr it so ....I won't look at it again ever anyway I'll be hanging it in the chamber in a few weeks time

great googly moogly!

Lol nice one mate. Yea watch looking at it. Our eyes don't see those colours well so to us it looks bright but no where near as bright as it actually is. Blue will damage your eyes.

I did you with the idea of just a UVA strip but I really wanted those UVB wavelengths too. I'll be watching to see what sort of results you get Cap!

Salutations,

Although i do appreciate the YouTube entries of Bruce Bugbee i'm increasingly less present on-line, so there's a lot that won't fill the hobby time anymore, unfortunately. In days before home-growing got further criminalized in my canuck province the Ultra-Violet subject would have made me read & watch all of it, with special curiosity evoked by IPM concepts meant to deter infestation by nuisible insects as "The Borg". The reasoning was that such little critters would possibly avoid UVA in fear of the more harmful UVB... In any case i did acquire 1 reptile bulb but never went as far as to reach firm conclusions, except i'd want to "chop UVB light periods" to implement "Pulse" mode exposure via timer, to prevent hurting vegetal life and yet simultaneously render my cultivation space even less inviting to parasites. But that was in another life.

Good day, have fun!!

Hi Egzoset,

Nice to see you in one of my threads again buddy! It's been a while. Bruce Bugbee is a great guy. I've always been a true believer that information should be free and easily available. Not that I'm a fan of socialism but free information empowers people to build upon what we have already achieved. I really appreciate people like him sharing his knowledge and research.

I really feel adding UVA/B is the key to unlocking the full potential of LED horticultural lighting. UVA improves plant physiology and UVB increases secondary metabolites within cannabis. UVA will increase leaf thickness and increase brix level that will in turn make it hard for critters. UVB will also effect their lifecycle in many ways and act as a deterent.

Another thing that really interests me is calcium signalling and the direct connection with UVA/B light. Ever since I switched over to LED something is missing. The plants grow nice and I get some killer yields but the plants never look as healthy as the plants grown under traditional HID lighting. Leaves seem thinner than the leaves of plants grown under other lighting as well as other characteristics seem to change when moving from florescent lighting over to LED.

I'm a stoner and didn't finish school so my vocabulary is lagging to do these subjects justice so I've provided some links for anyone that wants to read more. Much like humans, plants use UV light to produce vitamin D amongst other processes.

Calcium signalling in plants
https://link.springer.com/article/10.10 ... 005-0038-1

In pursuit of Vitamin D for plants
https://www.mdpi.com/2072-6643/9/2/136/pdf-vor

[MrNice]

Rite o I got a UV bulb / strip.....rbh6i lit it up and looked at it it made my feel sick as fuk for an hr it so ....I won't look at it again ever anyway I'll be hanging it in the chamber in a few weeks time

great googly moogly!

Thast a toy cap ...............lol

[seymore_budz]

So that's me, I'll probably break of into another thread to demonstrate the complete setup but I'll be running these alongside my LED. My goals are not to increase secondary metabolites by blasting them for a few hours a day but to deliver a consistent low dose of UVA/B to see how this affects the plants.

[FX]

Got my uva panel mounted along with the fr8 strip....

[Egzoset]

Salutations Seymore_Budz,

Nice to see you in one of my threads again buddy! It's been a while.

Oh, that's a nice thing to read! This might actually help me to remember who's who as i must admit being less than "socially" oriented.

Bruce Bugbee is a great guy. I've always been a true believer that information should be free and easily available. Not that I'm a fan of socialism but free information empowers people...

Well, he looks european but i doubt that's some bolchevic communist...

I really feel adding UVA/B is the key to unlocking the full potential of LED horticultural lighting.

This makes sense to me as well, but i got to wonder what's taking so long to develop perfect LED panels considering the whole spectrum (spreading from, say, 300 to 800 Å) can be divided into 2 dozen 20 nm bands at most. Consequently it would only require as many simultaneous sessions to identify slots not essential respective to a plant's vegetal phase. For example if it hurts to remove blue then it's got to be included on the LED array i figure...

Ever since I switched over to LED something is missing.

Are those LED spectrums programmable as a function of time on the long-term? Additionally i'm curious about how high the cotyledons will get, since i had begun to notice that my seedlings seemed to prosper best under strong CFLs rated around 4200 °K. At the time i reasoned that a massive stalk would give them a better start in life, as far as the leaves don't "bleach" that is.

I'm a stoner and didn't finish school so my vocabulary is lagging to do these subjects justice...

To be honest i got absolutely no hint of any impression like that. Perhaps it's my own style which feels misplaced but that's how i manage to still find some enjoyment/motivation from the remaining of my former hobby, vaporism being what's left in the "makers" domain.

I envy you!

Thank you for those 2 URL suggestions. Good day, have fun!!


P.S.: In this season i may happen to require calcium and vitamin-D myself!...

[Captain Beefheart]

I'm a stoner and didn't finish school so my vocabulary is lagging to do these subjects justice.......

@seymore_budz welcome to my world i got a job to string a sentence together skool for me consisted of detention + 6 of the best most months .

[Egzoset]

M'well i confused angstroems and nano-meters, hoping this alleviates unpleasant rememberances!

[Keeno]

We have a load if ISH UVA 8 systems on the way so can get a fair bit of testing done. In near future.