UVB?

[Buddernugs]

Who’s running it and how do you run it?
Notice any difference?

 

[Joebud]

Check Black Dog led. They have done all the research already. Let me know what you find.

 

[Deleted member 2835]

UVA is just as effective and you can run it for your entire lights on time.

 

[Buddernugs]

Thank you I’ll check them out,
Ya I have heard that too about uva but I keep stumbling across hear and their articles about 280-290 wave lengths being ideal

 

[Buddernugs]

Also confused about hangs heights, Cali light works says 3 feet above canopy ( non tent friendly) and Shane’s MIGROW uvb is 18-24 inches above canopy

 

[Bobby_Resigliano]

I've been using the HLG 30 watt 2ft UVA supplement lights for a few cycles now. I keep them same height as the lights. I've heard of UVB being better tho? Can you run them at the same time? Is one better than the other?

 

[Fiddler's Green]

Are UVA/UVB lights a viable option later in bloom to help keep mold/mildew at bay, especially prior to harvest? You guys just sent me down a rabbit hole.

 

[Deleted member 2835]

Are UVA/UVB lights a viable option later in bloom to help keep mold/mildew at bay, especially prior to harvest? You guys just sent me down a rabbit hole.

Not just to keep the ickies away but to also get your plants to pump out every last bit of thc possible.

 

[Fiddler's Green]

For indoor it makes sense to run it in tandem with the grow lights.

For my outdoor application I was thinking about hitting them with uv for a few hours at night, days prior to harvest.

In the end I think just being able to grow in unblocked sunlight will resolve a lot of my issues.

 

[Deleted member 2835]

If you're going to be spending money on electricity outdoors why not put a couple of fans on them instead

 

[NoWaistedSpace]

Are UVA/UVB lights a viable option later in bloom to help keep mold/mildew at bay, especially prior to harvest? You guys just sent me down a rabbit hole.

How deep do you want to go? Charts and graphs? What nm wavelength, for what function?
I've got all of it here somewhere.

 

[NoWaistedSpace]

Perfect light would be the exact wave length of the Mcree Curve on top, which will give you what is natural for photosynthesis to work properly. We've been "tweaking" our lights to get as close as we can, but the UVA and UVB only in recent years has become important. I think we all knew something was missing in the LED tech in mimicking the sun. The 660 reds and the 730 far red helped.
The led UV's were expensive and few worked with them, only UV bulbs manufacturers like Reptisun.
Wavelengths start around 310-380nm. (Migro is close to this I think)
Most "full spectrum" lights are 380-730.

I have the Agro Max 4ft Pure UV T5 bulbs.
I never use them anymore.

The low end 300-380nm gets sketchy because the info is not there,
so light makers draw imaginary lines to fill it in.

 

[Fiddler's Green]

If you're going to be spending money on electricity outdoors why not put a couple of fans on them instead

I would bring them inside and hit them with the UV a couple hours before lights out. Just for a couple days before harvest. Or, blast them just after chop while they are hanging.

I keep a fan running on the plants when I bring them in.

 

[lakegrow]

I have been using solarcure UVB 4 foot fluorescent for years now. Not cheap but well worth it for me. More frost and no more fungus gnats since I started using. Left one tent with out the lights and frost was much less so all have them now. Use them 6 hours a day while lights on 2 per tent. These guys only make UV which I like

 

[NoWaistedSpace]

I have been using solarcure UVB 4 foot fluorescent for years now. Not cheap but well worth it for me. More frost and no more fungus gnats since I started using. Left one tent with out the lights and frost was much less so all have them now. Use them 6 hours a day while lights on 2 per tent. These guys only make UV which I like

How far are you from canopy and what wattage?
I might have to break mine back out. I bought some 5 watt leds from 310- 380nm to add to my mix. I haven't really been working on lighting for about a year. Planning on creating another light with as much of the spectrum as I can afford. UV led's are expensive.
I've used the O3 generators too. The Mcree Curve shows a tiny bit in the spectrum.

 

[lakegrow]

How far are you from canopy and what wattage?
I might have to break mine back out. I bought some 5 watt leds from 310- 380nm to add to my mix. I haven't really been working on lighting for about a year. Planning on creating another light with as much of the spectrum as I can afford. UV led's are expensive.
I've used the O3 generators too. The Mcree Curve shows a tiny bit in the spectrum.

I run them about 24 inches but but they often get down around 12 inches late in bloom I use 2 per tent.
I use a standard 32 watt 4 foot fixture but they can be powered from 25 to 80 watts for special uses. These tubes have built in reflectors so you need to orient them with writing down. They are much much stronger than reptile lights.

I used to build high powered led flashlights along with specialty 256nm UV flashlights for blood detection and small cure jobs. I found using UV chips can be costly adding to lights.

 

[NoWaistedSpace]

I run them about 24 inches but but they often get down around 12 inches late in bloom I use 2 per tent.
I use a standard 32 watt 4 foot fixture but they can be powered from 25 to 80 watts for special uses. These tubes have built in reflectors so you need to orient them with writing down. They are much much stronger than reptile lights.

I used to build high powered led flashlights along with specialty 256nm UV flashlights for blood detection and small cure jobs. I found using UV chips can be costly adding to lights.

Yes, those UVB range are expensive.
Mine are Agro Max
I guess they would be 54 watts being a T5
They start at 280nm 75/25% UVB/UVA

 

[Weedkiller]

I was looking into these, bugbee said uv is beneficial but the chip is expensive to make and not very efficient.if I remember correctly the fluorescent fixture is best

 

[NoWaistedSpace]

Hey, I ran across this looking for the nm wave that kills bugs which is 253.7nm. There's a good bit of information on UV.
Ultraviolet Radiation (lbl.gov)

 

[619KGB]

Got a couple of these to try out on my hlgs running a separate timer last 6hrs a day at 15 min intervals to ease them into it. Seems the reccomend run times are different possibly due to fluorescent vs LEDs.