Advise me! Best source of UV light for "enhancement"

Positivity · Aug 14, 2014

tropzy said:
Thank lot for your answer it's very helpful so I think I'll gonna put 2x 24 watt arcadia 12% uvb 2' from the canopy for 6 hours(2x 3hours with 30min off) in the mid of the 12 hours from week 6 until end of week 8 on my 10 week strain . Thats sound good for you?

Not really familiar with just running the last few weeks. Personally never have run that light schedule.

If anything I'd probably do it in reverse. First 8 weeks on, then off for the last 2 weeks. Think sds recommended lowering uv exposure at end of flower, to preserve thc, and have higher thc levels in the end if anything. Continuing UVB toward the end of a plants life converts some of the thc to cbd if I remember right.....something like that.

I run it always on...beginning to end. Still deciding how much. I've run the full 12hrs and currently just 4hrs midcycle. Not sure exactly where I like it yet.

I'm in it for a more complex high and more fragrant and flavorful flowers. Not so much max thc. It accomplishes that well.

Hope it helps... :joint:

This is a recent shot of a early flower getting UVB from day 1....not sure why you'd want to wait to reap the benefits.....

churchhaze · Aug 14, 2014

How is the efficiency of those reptile tubes in general compared to violet and UV leds? (not efficiency at generating UV-B, but radiation in general)

I was considering some violet supplementation for my vero 3000k 80cri in flowering.

vitamin_green_inc · Aug 14, 2014

Positivity said:
Not really familiar with just running the last few weeks. Personally never have run that light schedule.

If anything I'd probably do it in reverse. First 8 weeks on, then off for the last 2 weeks. Think sds recommended lowering uv exposure at end of flower, to preserve thc, and have higher thc levels in the end if anything. Continuing UVB toward the end of a plants life converts some of the thc to cbd if I remember right.....something like that.

I run it always on...beginning to end. Still deciding how much. I've run the full 12hrs and currently just 4hrs midcycle. Not sure exactly where I like it yet.

I'm in it for a more complex high and more fragrant and flavorful flowers. Not so much max thc. It accomplishes that well.

Hope it helps...

This is a recent shot of a early flower getting UVB from day 1....not sure why you'd want to wait to reap the benefits.....

View attachment 3228745

Wow, that's super frosty. Early flower you said? Sign me up!

Positivity · Aug 14, 2014

churchhaze said:
How is the efficiency of those reptile tubes in general compared to violet and UV leds? (not efficiency at generating UV-B, but radiation in general)

I was considering some violet supplementation for my vero 3000k 80cri in flowering.

Well I use the floro reptile tubes for UVB. The led versions are way too expensive and low output. So there's no alternative other than mercury vapor or other hid style sources.

I still don't have any idea what violet 405nm brings to the table. I think it's a good idea just because it's not a blast of blue which isn't always wanted in flowering but extends cri and may affect other attributes. I plan on doing some experiments in my microcab shortly using 405nm and 365nm seperately. Just for fun as usual..slowly chipping away at the spectrum

churchhaze · Aug 14, 2014

That's basically my idea with the violets. It would help to widen the total spectrum provided.

430nm would be great for the absorbance peak of chlorophyll A, which I would speculate might be in sync with another sensor with an absorbance peak at the same wavelength. (similar to how Pr and chlorophyll A share an absorbance peak at 660nm).

Are there any efficient 430nm leds on the market now?

Positivity said:
Well I use the floro reptile tubes for UVB. The led versions are way too expensive and low output. So there's no alternative other than mercury vapor or other hid style sources.

I still don't have any idea what violet 405nm brings to the table. I think it's a good idea just because it's not a blast of blue which isn't always wanted in flowering but extends cri and may affect other attributes. I plan on doing some experiments in my microcab shortly using 405nm and 365nm seperately. Just for fun as usual..slowly chipping away at the spectrum

tropzy · Aug 15, 2014

View attachment 3228745[/QUOTE]

Positivity said:
Not really familiar with just running the last few weeks. Personally never have run that light schedule.

If anything I'd probably do it in reverse. First 8 weeks on, then off for the last 2 weeks. Think sds recommended lowering uv exposure at end of flower, to preserve thc, and have higher thc levels in the end if anything. Continuing UVB toward the end of a plants life converts some of the thc to cbd if I remember right.....something like that.

I run it always on...beginning to end. Still deciding how much. I've run the full 12hrs and currently just 4hrs midcycle. Not sure exactly where I like it yet.

I'm in it for a more complex high and more fragrant and flavorful flowers. Not so much max thc. It accomplishes that well.

Hope it helps...

This is a recent shot of a early flower getting UVB from day 1....not sure why you'd want to wait to reap the benefits.....

View attachment 3228745

Do you think I can just replace my normal 600whps with this for same effect than add arcadia bulb? http://www.solis-tek.com/digital-lamps/mh10k.html

Positivity · Aug 15, 2014

tropzy said:
View attachment 3228745

Do you think I can just replace my normal 600whps with this for same effect than add arcadia bulb? http://www.solis-tek.com/digital-lamps/mh10k.html[/QUOTE]

Wow...thanks for sharing that. I had no idea there was a hid mh bulb with that kind of output. Looks like it would work great. Too bad they don't show the spectrum down to 300nm. But, looking at the gradual curve it should hit UVB well.

The only thing I don't quite understand is why they suggest using it as a finisher and not a high noon type setting. Seems a lot of care is taken not to slow down bud growth.

That is definitely more suitable for larger setups

Only thing I would worry about is the substantial amount of blue in the spectrum that could loosen the bud structure if used for too many hours of the flower cycle.

Advise me! Best source of UV light for "enhancement"

Positivity

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churchhaze

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vitamin_green_inc

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Positivity

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churchhaze

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tropzy

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Positivity

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