Adding UVA

Nope_49595933949 said:

You seem upset that you bought an adequate but lower quality light.

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I just snagged a Scorpion Diablo for flower during HLG’s Croptober 25% off sale a few days ago and it should arrive today.

I will also grab their UVA or UVA XL bar very soon to experiment with as soon as flower starts.

Glad to see this conversation up on here for reference.

weednerd.anthony.850 said:

I just snagged a Scorpion Diablo for flower during HLG’s Croptober 25% off sale a few days ago and it should arrive today.

I will also grab their UVA or UVA XL bar very soon to experiment with as soon as flower starts.

Glad to see this conversation up on here for reference.

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I have been very impressed with the single Diablo board in my Veg tent. The Scorpion far red has been awesome as well. It's amazing how much light it puts out in a 5x5 enclosed tent

The best part is, I didn't buy the light because it has UVA, but you schmucks got your panties in a bunch about quality and "schooling" about it.

I love this place, so many egos and assholes lol.

And yes, you can visually see a difference in the color of the plants due to UVA, you can chucklehead all you want it changes nothing when the physical evidence is present.

Severed Tongue said:

The best part is, I didn't buy the light because it has UVA, but you scmucks git your panties in a bunch about quality and "schooling" about it.

I love this place, so many egos and assholes

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That's good, because it sounds like the diodes are shit anyways.

Nope_49595933949 said:

That's good, because it sounds like the diodes are shit anyways.

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Good thing your listening to them with your ears.... no end to it here lol

Severed Tongue said:

Good thing your listening to them with your ears.... no end to it here lol

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Who's them?

Drop That Sound said:

https://www.amazon.com/Sunlite-A19-LED-2W-BLB/dp/B013W6SJEM/ref=sr_1_1?crid=AQFK1EWV5XP6&keywords=uv+black+light+bulbs+365&qid=1667377546&qu=eyJxc2MiOiIxLjk0IiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=uv+black+light+bulbs+365%2Caps%2C134&sr=8-1

View attachment 5220847

Say a guy just wanted to do a small controlled test, with one of these 2 watt 365nm bulbs ^ beaming down on a single scrogged bud site, and with the clear plastic globe removed..

I mean.. growing weeds with black lights.. who would have thought?

Will that bud site grow better than all the rest?

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Would you use any other light with it? Research has shown there is a trade-off between quality and yield on either side of the UVA and Red/Far Red spectrum. The UV/violet/blue ends of the spectrum increase secondary metabolites such as terpenes and cannabinoids while the green/red/far red ends of the spectrum increases primary metabolites that drive growth and yield. Photosynthetic energy is diverted between these metabolites so more of one means less of another in general terms. This is a phenomenon indoor growers in past observed when they grew with Metal Halide and HPS lamps. MH has UV, violet and blue and produced less yield with better quality while HPS is mainly green, yellow and red with far red that produced more yield with less quality. Some growers mixed the two. This was before more modern CMH and dual-end HPS lamps, but the same has been observed in LED grows. Too much UV can stunt growth and will overly stress the plant by causing DNA damage.

Severed Tongue said:

The best part is, I didn't buy the light because it has UVA, but you schmucks got your panties in a bunch about quality and "schooling" about it.

I love this place, so many egos and assholes lol.

And yes, you can visually see a difference in the color of the plants due to UVA, you can chucklehead all you want it changes nothing when the physical evidence is present.

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There is no UVA in your Mars Hydro light. Seriously. That's all I'm saying. I didn't post those spectrographs to start an argument. Perhaps I could have been more diplomatic. I'm not making fun of your choice of light. They can still grow plants.

Grow Lights Australia said:

I hate to break it to you but those Mars Hydro UV diodes are not worth the plastic they are made from. Here is a spectograph of a Mars FC-4800 and as you can see the 410nm UVA diodes do not even show up. There is one diode per bar and they are of such low quality that they hardly emit any light at all.

It is the same for the Far Red diodes. There is only the faintest blip on the goniometer at 725nm.
View attachment 5220723

Here is an FC-3000 on a hand-held spectrograph. It is a slightly different spectrum that also claims to have UVA but in reality has almost nothing.

Mars Hydro Smart FC3000 300W Samsung LM301B LED Grow Light

www.mars-hydro.com

View attachment 5220725

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@MarsHydrofactory care to respond?

Ah jeez man, daddy isn’t going to come defend you here man. This isn’t an argument he is just stating facts.

if you just look at the photo it shows 0.2 for UV spectrum and they do say they have 360-400 leds inside sooo.....

amneziaHaze said:

if you just look at the photo it shows 0.2 for UV spectrum and they do say they have 360-400 leds inside sooo.....

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Show us the proof like @Grow Lights Australia did....

i watched his photo when i commented....

amneziaHaze said:

i watched his photo when i commented....

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penis

I get it, you think the .2% is actually used by the plant and makes a big improvement?

Ok …. I’m already running the HLG UVA … 1st i started with it on 2 hrs in the morning and 2 hrs before lights off , then each day I just kept it on longer till it’s 12/12 on timer and now when I move plants in the flower tent it just on the normal light hours ..

bubba73 said:

Ok …. I’m already running the HLG UVA … 1st i started with it on 2 hrs in the morning and 2 hrs before lights off , then each day I just kept it on longer till it’s 12/12 on timer and now when I move plants in the flower tent it just on the normal light hours ..

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So you would just go straight to 12/12? Have you noticed any difference?

Nope_49595933949 said:

So you would just go straight to 12/12? Have you noticed any difference?

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well this will be my 2nd run on it, more trichs build yes ….

Nope_49595933949 said:

penis

I get it, you think the .2% is actually used by the plant and makes a big improvement?

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thats what they advertise thats what the results say. thats what i have commented. is it a lot no idea
if 0.8 is max and the graph says 0.2 i guess its a lot something like 25% but i am no light expert i just read the graph.

amneziaHaze said:

thats what they advertise thats what the results say. thats what i have commented. is it a lot no idea
if 0.8 is max and the graph says 0.2 i guess its a lot something like 25% but i am no light expert i just read the graph.

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So it seems that's negligible and not going to do much of anything

Severed Tongue said:

Yea right, but your fixture has it right and I should buy yours instead right?

LoL

1st, I'm not using either of the lights you measured.

2nd All it takes is to compare photos of my previous runs (no uva) vs this one and yes, you can visually and visibly see the difference.

And actually looking at the picture you posted in more detail, it's showing 20% for spectrum between 400-499, so uh... yea, I guess you just one of the many that don't like MarsHydro.

I use Miracle-Gro too BTW.

LOL

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400-499 NM is BLUE, not UV.

Rather than throwing insults and turning this into yet another RIU pissing contest, let's try to learn something.

According to multiple sources (NASA, FDA, and others) here are the wavelengths of the UVA, UVB and UVC regions:
UVA 400 nm - 320 nm
UVB 320 nm - 290 nm
UVC 290 nm - 100 nm


Here's a good thread. I believe the spike between 380-420 is from the 400 nm UVA diodes with some bleed-over from the BLUE spike at 450 nm.