Uv led for diy, replacing flourecent t5 supplemental lighting

I've been using t5 for uv lightly throughout flower and a Lil heavier towards the end, I want to build a led fixture to replace this. From what I've researched, nichia is the best option for uv, I've been looking at a few other options as well but here's what I'm looking at purchasing it'll only take a few,


Any other suggestions?

At 1.45 watts per unit, it’ll take quite a few, but should work.

Phytoplankton said:

At 1.45 watts per unit, it’ll take quite a few, but should work.

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They're. Actually 3.7 volt at 1400 ma so technically they are just over 5 watt max but typical is 1 amp running at 3.7 volts so let's say I'll run these at 3 watts each. What your reading is the spectral output which is how color leds are measured Instead of lumens.

Those are very expensive but nichia have a very good uv diode. If youre buying in germany you may wanna consider led-tech.de they have a nice offering.

Jonesfamily7715 said:

I've been using t5 for uv lightly throughout flower and a Lil heavier towards the end, I want to build a led fixture to replace this. From what I've researched, nichia is the best option for uv, I've been looking at a few other options as well but here's what I'm looking at purchasing it'll only take a few,

Nichia NVSU233B SMD LED UV

Nichia NVSU233B SMD-LED UV: ✓Nichia Marke ✓Varianten ohne/mit Platine ✓1400-1730mW, 365-405nm. LEDs.de kaufen.

www.leds.shop

Any other suggestions?

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I would wait on the UV LED for now and go with Solacure T12 Quartz 285nm-310nm highest UV output on the market, 2nd best option which I use as well is Migrow UV-A/B - It's a T8 310nm peak and it works like a champ.

They come in 4 or 2ft bulbs for the Solacure and 2ft for the Migrow.

Best UV on the market period - I use it so I am being honest with you.

Rocket Soul said:

Those are very expensive but nichia have a very good uv diode. If youre buying in germany you may wanna consider led-tech.de they have a nice offering.

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Lol I was stoned looking up diodes and data sheets I didn't even realize those were In Germany I gotta find a good American distributor I've had real good luck finding cool led shit at flashlight stores online.

widowmaker31 said:

I would wait on the UV LED for now and go with Solacure T12 Quartz 285nm-310nm highest UV output on the market, 2nd best option which I use as well is Migrow UV-A/B - It's a T8 310nm peak and it works like a champ.

They come in 4 or 2ft bulbs for the Solacure and 2ft for the Migrow.

Best UV on the market period - I use it so I am being honest with you.

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I've been using the agromax t5 it'll roast a plant fast lol I've been looking at those solacure tubes I will need some soon I'm on my last bulb

Jonesfamily7715 said:

I've been using the agromax t5 it'll roast a plant fast lol I've been looking at those solacure tubes I will need some soon I'm on my last bulb

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Right on! The Solacure will make them jump! It's Very High Output - I have them on automated light mover and have them "wand" above the canopy back and forth throughout flower ~

Jonesfamily7715 said:

I've been using t5 for uv lightly throughout flower and a Lil heavier towards the end, I want to build a led fixture to replace this. From what I've researched, nichia is the best option for uv, I've been looking at a few other options as well but here's what I'm looking at purchasing it'll only take a few,

Nichia NVSU233B SMD LED UV

Nichia NVSU233B SMD-LED UV: ✓Nichia Marke ✓Varianten ohne/mit Platine ✓1400-1730mW, 365-405nm. LEDs.de kaufen.

www.leds.shop

Any other suggestions?

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I'd be looking at the Nichia NVSU119 series. They are much cheaper and much more efficient than the glass package 233.


The only issue is they only go down to 375nm (+ 385, 395, 405). We use the 405nm 219 series in our LED panels as the 405 is the only 3535 Nichia UV diode with a three-pad solder pad (anode, cathode and heat pad). The 365nm diodes you're looking at are only 37% efficient, wherease the 119 series are around 65% efficient. The bins we use are around 71% efficient.

We've done a few trials on UVA vs UVB and we're getting better reuslts with higher wavelength UVA for longer periods (405nm for 12 hours). The 405 is also photosynthetic, another reason we use it.

With all that, T5s are still the mot economical way to get UVB and UVA. The problem with UVB is it oxidises cannabinoids at the same time as it stresses the plants into producing more. Our UVB trials actually went backwards in terms of cannabinoids because the UVB was breaking them down faster than the plant was producing them. That was under 6 hours a day. I would only run UVB for around 2-3 hours a day if I was going to use it, but weaker UVA has more advanatges and still produces the same effect.

^ Bogus. The reason Bugbee hasn't been able to prove it is because he's never tested UVA on high-THC plants. They don't grow high-THC plants in Utah – it's illegal – so all their testing is on hemp and high CBD. Their methodologies are also suspect.

I've already explained this numerous times. But here's a recent post that links the scientific tests that are often quoted, and more often mis-interpretted: https://www.rollitup.org/t/red-light-best-for-budding.1093422/page-4#post-17454770

Prawn Connery said:

^ Bogus. The reason Bugbee hasn't been able to prove it is because he's never tested UVA on high-THC plants. They don't grow high-THC plants in Utah – it's illegal – so all their testing is on hemp and high CBD. Their methodologies are also suspect.

I've already explained this numerous times. But here's a recent post that links the scientific tests that are often quoted, and more often mis-interpretted: https://www.rollitup.org/t/red-light-best-for-budding.1093422/page-4#post-17454770

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I'm not arguing it. I just got a migro uvb310, myself. I'll be testing it out in about a month. I just figured people might be interested in the video.

Jonesfamily7715 said:

I've been using the agromax t5 it'll roast a plant fast lol I've been looking at those solacure tubes I will need some soon I'm on my last bulb

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I also use the Agromax t5s. Need some distance between them and the plants for sure

Prawn Connery said:

The problem with UVB is it oxidises cannabinoids at the same time as it stresses the plants into producing more.

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So what's the end product of photooxidation on cbg, cbd? Cbg/cbd oxide? Without oxidation your hairs would stay white and trichomes would never turn cloudy. Without oxidation, cannabinoids would never form.


If trichomes are defense from photooxidation, why don't 98% of seedlings have them? Why doesn't a plant vegged in Arizona for 6 months have any frost? Frost is seed oils with no seed to fill. Seed oils that keeps oxidizing into terpz n noids.

Hollatchaboy said:

I'm not arguing it. I just got a migro uvb310, myself. I'll be testing it out in about a month. I just figured people might be interested in the video.

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I'm sorry to respond like that. It's just that some people quote Bugbee like he's god when we've never seen any evidence of him growing high-THC strains. In the Migro video he says "Multiple tests at different doses" but it doen't appear they've been published or peer reviewed, so we don't know what waveglength UVA and methodologies he used, and what strains were tested. If you wanted to know if UVA influences cannabinoid synthesis, wouldn't you use a typical commercial or popular recreational strain with known (mid to high) THC levels in your trials? His blue photon trials only tested typical 450nm blue pump LEDs (blue is 400-500nm) and had 0.3-0.5% THC – which is basically industrial hemp.

And as you know, Migro sells a UV light. People who use UV see the difference.

EatYoTerps said:

So what's the end product of photooxidation on cbg, cbd? Cbg/cbd oxide? Without oxidation your hairs would stay white and trichomes would never turn cloudy. Without oxidation, cannabinoids would never form.


If trichomes are defense from photooxidation, why don't 98% of seedlings have them? Why doesn't a plant vegged in Arizona for 6 months have any frost? Frost is seed oils with no seed to fill. Seed oils that keeps oxidizing into terpz n noids.

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Cannabinoid synthesis is a process of carboxylation and decarboxylation, not photo-oxidation. Hydroxy-THC is oxidised by UV ecposure into THC-COOH.

Seedlings are not flowers and – more importantly – do not need to protect embryonic seeds themselves that are most susceptible to photo-oxidation. That is why cannabinoids are mostly produced in the calyxes that protect the developing seed. Leaves have their own systems of protection from photo-oxidation such as incidence angle, transpiration and chloroplast aligment. Also, vegging cannabis plants still produce cannabinoids. The reason fan leaves don't have many (if any) trichomes (except near the base and petioles) is because they would interfere with light harvesting for photosynthesis.

I have noticed an increase in trichomes with the pure uv tubes they are 75% uvb 25% uva but there is no way I could run them constantly unless I was up like 4 foot and slowly broke it in, I guess that's my biggest issue with them, I've seen so much controversy over the whole uva vs uvb maybe it would be cool to try and build a strip with a couple channels to mix uva and uvb as I choose

Prawn Connery said:

^ Bogus. The reason Bugbee hasn't been able to prove it is because he's never tested UVA on high-THC plants. They don't grow high-THC plants in Utah – it's illegal – so all their testing is on hemp and high CBD. Their methodologies are also suspect.

I've already explained this numerous times. But here's a recent post that links the scientific tests that are often quoted, and more often mis-interpretted: https://www.rollitup.org/t/red-light-best-for-budding.1093422/page-4#post-17454770

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dont you need UVB to stimulate the UVR8 receptor? i assumed uva alone did not stimulate the UVR8 receptor or am i wrong af?

Jonesfamily7715 said:

I have noticed an increase in trichomes with the pure uv tubes they are 75% uvb 25% uva but there is no way I could run them constantly unless I was up like 4 foot and slowly broke it in, I guess that's my biggest issue with them, I've seen so much controversy over the whole uva vs uvb maybe it would be cool to try and build a strip with a couple channels to mix uva and uvb as I choose

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My light has uva diodes, and they run constant. Do they have uvb diodes? I've not seen any yet, though I've not looked in a long time.

I just got the uvb310. I figure it should be good enough for my 3x3, along with the uva from my light.

How high do you hang yours?

secretmicrogrow420 said:

dont you need UVB to stimulate the UVR8 receptor? i assumed uva alone did not stimulate the UVR8 receptor or am i wrong af?

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Here is the UVR8 absoorption curve. You can see that it peaks at around 285nm (UVB) – which is most strongly absorbed – but the pigment also absorbs the entire UVA range and even goes into the blue range, however more light in those regions is needed to stimulate the photoreceptor pathway. Absorption is exponential, which is why you only need a very small amount of UVB or a much larger amount of UVA to trigger a UVR8 photomorphogenic response. The longer the wavelength, the more photons required. This is the reason why blue light also shows a response, but mostly in the deeper blue/violet region, and is much weaker around 450nm and beyond, where typical blue pump LEDs emit.