Lighting What are you waiting for? What's going to change the game? Who is doing interesting stuff?

So, did you buy the light already? Is it the UVR LED bar they are selling? Looking at the pictures with it, that is a really really narrow UV spectrum they are selling. It's between what looks like 365nm and 380nm. I was poking around looking for UV LED fixtures but it seems like everyone only has the higher wavelength UVA currently. The limited research I could find suggested you need a mix of UVA/UVB for good response. I could be wrong and there are definitely guys on here with way more light knowledge than I.

If that spike is so short it probably isn't into a damaging enough wavelength that is can be run for so long. All the lights with UVB suggested just a few minutes per hour. @Mañ'O'Green has a UV fluorescent bulb setup that he runs for a couple hours a day towards the end of flowering. I was kind of surprised at the time/length but he has got it dialed from the obvious results.

I think he is also running a "10k UVA plus" finisher bulb at the same time. If you're thinking of adding UV, and I know that UVR is going to clip to your Gavita nicely, you might be better off investing in a couple of the UV fluorescent bulbs. I bet they will be significantly cheaper and the spectrum looks like it will be "better" than what the LED guys are pushing right now.

Id at least look at the Agromax UV bulbs. A 4' fixture would probably zip tie to that black bar in the middle of your 1700e and then you could use a timer. Either the pure UV that is UV-A/B or the 10k UV-A plus. If I had the space I'd copy some of MOG's setup and run a 4' of the 10k-A on the sides and one Pure UV down the middle.

Price wise I bet that Gavita is $$$$

UV-A/B

UV-A plus


It's only a 30w light so I believe them on being able to run it for 12 hours.


CutterAU has a 385-420nm UVA kit with a 100w driver.

I'm curious to whether UVB is actually necessary when running UVA.
 

It's only a 30w light so I believe them on being able to run it for 12 hours.


CutterAU has a 385-420nm UVA kit with a 100w driver.

I'm curious to whether UVB is actually necessary when running UVA.
That chilled link was super helpful for me thank you.
 
I believe the long standing general illegality of cannabis has absolutely hampered studies. Very little good research to go on. However!


TLDR highlights:
Cannabis growers have been interested in UV light for a long time; however, the relationship between cannabinoids and UV-B is not as direct as first proposed. Increased concentrations of THC, but not of other cannabinoids, were found with UV-B treatment in both leaf and floral tissues of drug-type plants.

And lower down in the article: (NS1 and AP673L are just the designations they used for LED lighting as they compared them to HPS)

We suggest that the blue and UV-A wavelengths positively affected THC synthesis in treatments NS1 and AP673L, whereas the lack of blue and UV-A irradiation in the HPS treatment resulted in a lower amount of THC in flowers.


From what I can find UV light is good and effective and that both UV-A and UV-B work. Of course nothing I've found has specified wavelength or intensity. Yet.

@damien50 (Guys always on the edge of the new stuff) mentioned CutterAU making UV lights. Quite an interesting website.

They have CUVA LED strips and a blip about using it for cannabis growing. Looks like 385-430nm spread.

BUT!!

Check out their UV-C/UV-B strip: I do know UVC is quite dangerous/damaging wavelengths to most living tissues. It's used as a sterilizer to essentially vaporize and lyse airborne viruses and bacteria.


This is the image they put with the C/B strip:

UVCUVBENGINE-600x600.jpg
 
I think for most of us just better lighting in general would probably do more. But that's no fun!

It's just like when I was in the import car/street racing scene. Everyone wanted a new intake, or exhaust, or BS blue LED headlights to go fast. Nah, it's tires. You need better tires. But tires aren't fun!!!
 
Cali Light works already doing the integrated UV, with total spectrum control....


Hu. This is basically what I want out of a light. Next upgrade will be a company doing this, why have 5 lights when I can have 1?
 
Cali Light works already doing the integrated UV, with total spectrum control....


Hu. This is basically what I want out of a light. Next upgrade will be a company doing this, why have 5 lights when I can have 1?

Have you seen these?

That CLW is expensive but I believe it was @The Mugwamp owns this might already and has a journal going. It does still need Far Red as the UVB only covers the 280nm range and otherwise it's a 400-660 spectrum.
 
Have you seen these?

That CLW is expensive but I believe it was @The Mugwamp owns this might already and has a journal going. It does still need Far Red as the UVB only covers the 280nm range and otherwise it's a 400-660 spectrum.
Those are nice. I think if you add up how many you'd need to cover a 5x5 or 4x4 and you aren't a ton cheaper then the CLW. Im not sold on CLW as a company tho. No experience either way so that doesn't mean much.
 
Those are nice. I think if you add up how many you'd need to cover a 5x5 or 4x4 and you aren't a ton cheaper then the CLW. Im not sold on CLW as a company tho. No experience either way so that doesn't mean much.

It's nearly 1k to cover a 4x4 but they do offer a 10% discount. However you are getting UVA-800nm lighting at 3.0umols/j with waterproofing. No need for supplementation and excellent top bin Nichia+Seol Conductor? diodes. It isn't the right light for those with height challenges though, mid power strips would better like the Gavita fixtures.
 
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