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Are Black lights even worth it?

  • Thread starter Thread starter OgBoogs730
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Are Black lights even worth it?

OgBoogs730 51 Replies 4,738 Views
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OgBoogs730

OgBoogs730

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#1
Hey all was wondering if black lights under the canopy make a difference and also can they be on when lights out during flower? Thanks
 
#2
An actual black light or UV like the supplement bars offered by Spider Farmer and others?

If you're talking UV, I run mine 5 minutes every 1 hour during main lights on in veg, increase to 10 minutes every 1 hour during main lights on in flower.

I've never ran them during lights off, my IR runs 15 minutes before lights on and 15 minutes after lights off.
 
#14
The_Greenist said:
Do they make a noticeable difference for terpenes? I'm thinking about getting some.
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Many folks have done test with clones off the same mother with and without UV and can't tell a diff. concerning terps. I run my UV lights for a max of 2 hours to simulate mid day sun during flower to just piss the plants off a tad to make them produce more sugar. Some respond,, some don't...
 
#15
I notice an increase in terps and trichome production. Most people dont give the plants enough to see a difference
 
#16
Blastfact said:
Many folks have done test with clones off the same mother with and without UV and can't tell a diff. concerning terps. I run my UV lights for a max of 2 hours to simulate mid day sun during flower to just piss the plants off a tad to make them produce more sugar. Some respond,, some don't...
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From studies I have read, no positive in thc, no positive in yields but terpene levels are increased.

It's similar to drooping rh levels in flowering, the plant is trying to protect itself with resin.
 
#17
The_Greenist said:
From studies I have read, no positive in thc, no positive in yields but terpene levels are increased.

It's similar to drooping rh levels in flowering, the plant is trying to protect itself with resin.
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Getting more trich's/resin/sugar does not equate to more terps. I use my UV to get more sugar. But it does not always work. And the terps are so screwed up with this new fufu weed. You won't know unless you do a test with the same clones from a mother plant with and without UV. UV can also help with some basic bug and mildew control because the terps that help to protect the plant from bug and mildew/mold have been bred out of the fufu weed. UV is still in the realm of advanced bro science. And any UV light source degrades amazingly fast. Esp. with led. And can only be measured with a epar meter. When my current UV lights stop making UV as seen with my epar meter I won't be replacing them unless there free. One of the few good things we got out of old CMH lights was a bit of UV with the right bulbs. BUT if they were good UV producers they cost more and burnt out faster.
 
#18
2Water said:
I got the uvb lights from AC infinity, run the same schedule as the main light, still need to get some for the veg tent
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2Water said:
I notice an increase in terps and trichome production. Most people dont give the plants enough to see a difference
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Did you just decide to run them for the same hours as the main light to see what happened or did you find an article or research online saying to?

I tried to find information on how long to run them but really couldn't find anything other than spectrum talk and how it effects plants so I just went with the manufacturer recommendations of 10 mins every 1 hour.
They're the spider farmer bars with 120 diodes, 60 each bar, 30 watts I think.
 
#19
Newty said:
Did you just decide to run them for the same hours as the main light to see what happened or did you find an article or research online saying to?

I tried to find information on how long to run them but really couldn't find anything other than spectrum talk and how it effects plants so I just went with the manufacturer recommendations of 10 mins every 1 hour.
They're the spider farmer bars with 120 diodes, 60 each bar, 30 watts I think.
Click to expand...
Mostly from reading, I'll have to look into it, but I from what I remember (and go by) is percentage of UVB within the light spectrum as a whole. I looked up UVB percentages of Afganistan and equatorial locations to try and get a range that the plants would get naturally.
 
#20
Having a bad morning, but this is a good one from Dr Bugbee if you extrapolate with other information, such as the coefficient needed for the lower efficiency of UVA LEDs. Still looking for my old notes
 
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