LEDs and potency

pheno hunt....pheno hunt....pheno hunt

si, so true, I have this beuatiful afghan cultivar that pops ups once in a while in my hunts, so frosty and never greasy...So lovely looking and has as much THC as lawn grass...It is the loveliest looking bunk I may have ever grown, one of the frostiest of all...sans more UV....hmmm...just an oddity that keeps popping up here and there...

pheno hunt ....pheno hunt...pheno hunt

I feel like I can tell a difference after just 2 days with the CFLs. Seems to have more zest. The combination is better than either alone I guess.

BobCajun said:

I feel like I can tell a difference after just 2 days with the CFLs. Seems to have more zest. The combination is better than either alone I guess.

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Bob you mean the plants look zestier or smell better?

BobCajun said:

I feel like I can tell a difference after just 2 days with the CFLs. Seems to have more zest. The combination is better than either alone I guess.

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I found a great thread on this over at icmag in the side by side section. It was between mh and hps but it has some great examples of each. The OP just kills it with cheap mh bulbs.

Why not just hang a couple of the PowerVeg T5's in the mix to get your uv as well as some more plant usable light?

http://www.eyehortilux.com/products/power-veg.aspx

OneHitDone said:

Why not just hang a couple of the PowerVeg T5's in the mix to get your uv as well as some more plant usable light?

http://www.eyehortilux.com/products/power-veg.aspx

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Those look sweet. How hard is it to build a single 2' t5ho fixture? I would like to try these and some reptile bulbs with some 3000k cxa's

grouch said:

Those look sweet. How hard is it to build a single 2' t5ho fixture? I would like to try these and some reptile bulbs with some 3000k cxa's

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No need to build one:
http://growershouse.com/sun-blaster-t5-ho-fluorescent-strip-light-2
Just be sure to get the reflector that goes with it and toss the piece of crap 6400K lamp that comes with it

grouch said:

Those look sweet. How hard is it to build a single 2' t5ho fixture? I would like to try these and some reptile bulbs with some 3000k cxa's

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This seems like a great idea. Would this be a reptile "day" or "night" bulb?

Future Skills said:

This seems like a great idea. Would this be a reptile "day" or "night" bulb?

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Uv b, probably the reptisun 10, as its easy to find in t5ho

I think they're might be LED monos perfect for this. I'll post if I find anything. I've been looking for a simple, low wattage-dissipation way to enrich the spectrum of my COB bars.

Mine previous stuff, grown under 100w cxa was the dankiest, smelliest kush what i can have, i have had some way more smelly, but imho when i grew under hos / cfl - i havent made such dank stuff as with leds ever...

To update this, regular white CFLs didn't do shit to increase potency but blacklight CFLs do seem to work.

superbak3d said:

If you haven't, I highly recommend checking out this journal.

https://www.rollitup.org/t/the-leprechauns-pot-o-gold.855314/page-22

This is the result from using additional UVB. RM3 uses a few UVB tubes and you can see how ridiculously frosty they get. He's got it dialed in for UVB.

If you think you got frosty buds, his will put yours to shame.

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Everyone who's tried those buds has described the effect as narcotic. That could be a deterrent to those who don't find that trait desirable.

ttystikk said:

Everyone who's tried those buds has described the effect as narcotic. That could be a deterrent to those who don't find that trait desirable.

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I don't think it even needs to be UVB. I think UVA, blacklight, also works. There just haven't been experiments with UVA only (that I could find). Maybe UVB works better though. Actually I should probably try to get some reptile lights.

grouch said:

Those look sweet. How hard is it to build a single 2' t5ho fixture? I would like to try these and some reptile bulbs with some 3000k cxa's

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they only make powerveg in 4'

they fit standard 4' t5ho fixtures

BOBBY_G said:

they only make powerveg in 4'

they fit standard 4' t5ho fixtures

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I'm leaning towards something like the arcadia t5 controller with sealed sockets on wires. I just dont know if it will work stateside or if there is an equivalent system in the US.

BobCajun said:

I don't think it even needs to be UVB. I think UVA, blacklight, also works. There just haven't been experiments with UVA only (that I could find). Maybe UVB works better though. Actually I should probably try to get some reptile lights.

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It needs to be UVB, UVA won't help.

ttystikk said:

It needs to be UVB, UVA won't help.

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385 nm increases phenolics. That's far above UV-B and right in UV-A. So blacklights must have value. How do we know 385 nm doesn't increase THC? I know UV-B would work better but UV-A might also be worth using.

BobCajun said:

385 nm increases phenolics. That's far above UV-B and right in UV-A. So blacklights must have value. How do we know 385 nm doesn't increase THC? I know UV-B would work better but UV-A might also be worth using.

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I would like to see some 365nm-400nm leds used in a side by side up against the same setup without.

Blacklight bulbs look to filter out much of the light with the coating. Reptile bulbs look like they have a better filter that allows more light through. Not a very scientific review just a sloppy observation.

BobCajun said:

385 nm increases phenolics. That's far above UV-B and right in UV-A. So blacklights must have value. How do we know 385 nm doesn't increase THC? I know UV-B would work better but UV-A might also be worth using.

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I saw direct contradictory evidence in a study I read, and of course can't find right now, that was clear that 315nm in the UVB range was the active wavelength.