UV Results from the community.

[Airwalker16]

Hmm!!
Hard to believe that, bro. A quick forum wide search already shows me posts about UVB from 2009.

https://www.rollitup.org/t/to-uvb-or-not-to-uvb.229101/

So this is nothing new and the first research in this area were made in the 70's.
Instead of talking about it for 2 years you should try it. The things are not expensive; a 24w bulb with ballast and reflector you can build yourself for $30 and if you are lazy you can take a ready to use T5 fixture for reptile bulbs you get for 60-70 $.

UVA/B have become interesting again because spectrum tuning with LEDs is so much easier. We can communicate with the plants now by using specific wavelengths to trigger certain behaviors. T5/T12's are only used because there are no UVB LEDs to date that are durable enough and are not 10x more expensive in the same time.

A 24w/2ft reptile bulb hanging 12-14" above the canopy covers already a 2x 2' area and the more intense Agromax/Solacure bulbs cover even more surface area because they need 16-20" at least to not harm the plants.
I have two 24w bulbs running 3 times 25 minutes. Thats 1,25h or only 60w per day; for a 70day cycle that would be only 4,2kwh. Even with reptile bulbs and 8h the day it would end up with only 30kwh more. So its not a huge cost factor.

I'm saying the agromax bulbs. Not UV in general. I'd never claim I was the first to bring it up lol.

 

[Airwalker16]

I don't know how you got that I said I first brought up UV from that post...haha

 

[Randomblame]

I don't know how you got that I said I first brought up UV from that post...haha

Lol, yeah! Language barrier or simply too stoned..!
Yesterday I cooked some canna cocos oil for sweetmeat, cooking and micro dosing. Maybe the 2 spoons was a bit too much at the beginning

 

[Tejashidrow]

Lol, yeah! Language barrier or simply too stoned..!
Yesterday I cooked some canna cocos oil for sweetmeat, cooking and micro dosing. Maybe the 2 spoons was a bit too much at the beginning

Don’t feel bad.
I thought the same thing when I first read that post.
And I wasn’t stoned....

 

[Tejashidrow]

I am upgrading my small (2.5) sf grow area with a 150 watt dimmable 288 qb.
I am including 2 -12 inch 15 watt each t5 dessert reptile lite on both sides of the Quantum Board.
All those other upper end Uv light suppliers that claim to be so much better than reptile lites don’t come in 12 inch t5 size.
If anyone knows a good 12 inch t5 uv lite let me know!!!
With my small area hopeing to see a difference.

 

[Airwalker16]

Pat yourself on the back much?? Jesus Christ bro

I don't understand?

 

[OneHitDone]

I don't understand?

You sound like an only child in every thread your posting in.
Me this, I that, I was first

 

[Rocket Soul]

https://www.rollitup.org/attachments/uvb-effects-on-photosynthesis-growth-and-cannabi-pdf.4256003/

Link is dead, at least for me. Id love to read it though.

I don't understand?

You sound like an only child in every thread your posting in.
Me this, I that, I was first

Oh please cant we have one thread without the usual bitching? Yep, Aw16 might be a very tempting target from time to time but if i can resist the urge im sure you can too.

 

[Rahz]

Randomblame posted the paper a couple replies down.

 

[Randomblame]

I am upgrading my small (2.5) sf grow area with a 150 watt dimmable 288 qb.
I am including 2 -12 inch 15 watt each t5 dessert reptile lite on both sides of the Quantum Board.
All those other upper end Uv light suppliers that claim to be so much better than reptile lites don’t come in 12 inch t5 size.
If anyone knows a good 12 inch t5 uv lite let me know!!!
With my small area hopeing to see a difference.

Reptisun 10.0 T5HO is comparable with the Arcadia d3 dessert and available in 12" T5. (12 vs 10% UVB)

A quick search gave me this but I'm sure you can find them a little cheaper..

https://www.amazon.com/reptisun-T5-10-0/s?k=reptisun+T5+10.0

 

[Rocket Soul]

Anyone has any advice or experience on UVA 395 nm? Except standard starting low/short intervalls?
Will it inhibit stretch, like blue light and would i therefore count the watts towards my desired red/green/red rates? Does it also ripen the bud faster?
I think @Moe Flo used some Uvas?

 

[Airwalker16]

I just find it weird that aaaalllllllllllll these years science has stated that UV rays were the catalyst for creating THC to come up through the stalk into the head, but it's obviously not true. So is it just a function of Photosynthesis?

 

[spoonayyy]

Just added some reptile bulbs to my light.. running them for 4 hours per day for now. I'll let you know how the plants like it.

 

[captainmorgan]

I've played around with UV T5 bulbs for years and they will give you a noticeable bump in THC levels, did some limited lab testing. I settled on adding 4-5 hours a day in flower, mid lights on cycle. I stopped using it because the strains I run don't need any help in the THC department so I didn't think it was worth the added expense and effort. But if I had a strain that checked all the boxes except strength I would run it again.

 

[Warpedpassage]

I just find it weird that aaaalllllllllllll these years science has stated that UV rays were the catalyst for creating THC to come up through the stalk into the head, but it's obviously not true. So is it just a function of Photosynthesis?

The way i understand it, uv played a role during millions of years of evolution of the plant. Cannabis may have adapted to the presence of uv by producing certain cannbinoids and terpenes to protect itself. So even without the addition of uv in a grow the plants will still produce said cannbinoids at this point in its evolution. I think the hope is by adding uv, you can push the plant to produce even more of the said cannabinoids.

Just how i understand things at the moment.

 

[Budzbuddha]

Glad this thread is here , been experimenting with UV myself. Which I built in 2 Sunblaster lamps between dual QB 96 elites ( with 630/660nm ).

I haven’t finished a full run yet but have begun firing them during the mid cycle of 12/12 of week 5 for 25 minutes. I didn’t want to push to much . They have Agromax pure UV and 10000k finisher bulbs.

For me , I just use a timer on them ( they are daisy chained together ) so it fires at cycle peak then tapers off. Didn’t make sense to run at a later time when plants might reach light saturation and not be able to tolerate it. So for now I just do a brief once per day.

I do notice more fragrance and better sugar trim so far. So I’m sure it’s doing something.

Never tried the reptilsun bulbs for comparison or the hortilux. But as stated I think certain strains can benefit some might be negligible.

 

[mr. childs]

Glad this thread is here , been experimenting with UV myself. Which I built in 2 Sunblaster lamps between dual QB 96 elites ( with 630/660nm ).

I haven’t finished a full run yet but have begun firing them during the mid cycle of 12/12 of week 5 for 25 minutes. I didn’t want to push to much . They have Agromax pure UV and 10000k finisher bulbs.

For me , I just use a timer on them ( they are daisy chained together ) so it fires at cycle peak then tapers off. Didn’t make sense to run at a later time when plants might reach light saturation and not be able to tolerate it. So for now I just do a brief once per day.

I do notice more fragrance and better sugar trim so far. So I’m sure it’s doing something.

Never tried the reptilsun bulbs for comparison or the hortilux. But as stated I think certain strains can benefit some might be negligible.

View attachment 4277370 View attachment 4277371 View attachment 4277372 View attachment 4277374

i really think that 2ft bulb is just enough to compliment.

 

[Rocket Soul]

Im getting some UVA strips from Cutter, 390 and 400nm. Anyone have any advice on how much wattage per 4x4 and how much time? I know enough to be carefull with UVB but i dont know how much care i need with UVA.

 

[PrometheanLeaf]

Not a lot of care with uv-a I'd maybe run 5-10% total wattage the entire lights on. Seems to work well for the chilLed boards.

 

[Moflow]

Im getting some UVA strips from Cutter, 390 and 400nm. Anyone have any advice on how much wattage per 4x4 and how much time? I know enough to be carefull with UVB but i dont know how much care i need with UVA.

UVA is bad too
The plants underneath the disco boards are loving it, there's uv 385nm in those but nothing compared to what you'll be using.
I stopped using the 410nm 385nm led as the timer kept playing up and it wouldn't been the first time I was in the room without realising they were on ffs.
My mate has those 4ft Solacure floros in his 8 x 4, I don't think they are on for too long tho, there's a lot of uvb in it.
Maybe look at CLW light fixture or fluence? n see wat their uv ratio is?
I believe you could run those 390nm 400nm for 12 hours on but at what wattage, I don't know