Uv Light??

GT21 · Jun 26, 2016

I start uv right after the stretch phase and run all the way through. Can use almost any nutrients and get the same quality.

SilentL · Jul 6, 2016

So soon I can test uv-treated cannabis.
I bought two 18 w tubes and put them behind bars as picture's show:
20 $*2 piece and one 20 w bulb. 56 w and 4w from bugkiller. It is rolls in top so adjust where I want them and also move them in the other level.
60 w uva-uvb extra . The 4 from led of 120 i really don't know so much about bot they are sure good for the spektrum.
As the 100w cfl I put in for better and differnt spektra.

GT21 · Jul 6, 2016

SilentL said:
So soon I can test uv-treated cannabis.
I bought two 18 w tubes and put them behind bars as picture's show:
20 $*2 piece and one 20 w bulb. 56 w and 4w from bugkiller. It is rolls in top so adjust where I want them and also move them in the other level.
60 w uva-uvb extra . The 4 from led of 120 i really don't know so much about bot they are sure good for the spektrum.
As the 100w cfl I put in for better and differnt spektra.View attachment 613967 View attachment 613968

Nice... this is how i use them

SilentL · Jul 6, 2016

GT21 said:
Nice... this is how i use them

Thats real nice , that's how I first wanted to do but I had to buy from Germany the TCL-uv's. Only two kinds of uv bulbs where I live. One of them produced to little uv-b so Thats why I bought TCL ( TCL I can change 6 $ , bulb good here 25 $ and cost for transport ). Little bit trickier to hang up but as you can se very simple , doesn't look perfect but the plant's will produce more THC to ME :) .
ref: ( Swedish agricultural university ) uv-b increase THC
I belive in broad spectrum so it's HPS CFL TCL LED so from UV-B to Infrared

Toaster79 · Jul 6, 2016

UV spectrum increases THC-V not THC. If you want a good UV-A/B light, look into reptile lights. Trixie Desert Pro 12.0 puts out 12% UV spectrum. Can't beat that.

SilentL · Jul 6, 2016

Toaster79 said:
UV spectrum increases THC-V not THC. If you want a good UV-A/B light, look into reptile lights. Trixie Desert Pro 12.0 puts out 12% UV spectrum. Can't beat that.

If THCV is Produced or THC as name for all THC's . That I can't read about from SLU ( Swedish Agric university ).
Yes it is the same brand I was thinking about. There bulbs are propably great. TCL I can use also for clones and babys. ( only change to another Neon light ). It is a matter of invested money and how much... TCL you have to put a paper beside them to see they are on - blacklight - 2*18 w only uv-a and uv-b, I guess after the info I have.. The two pictures the uv - lights are on.
Thank's for tip for it's much more simple to buy the bulbs if you can get them easy.
. Grow more better etc....And test it :)

keiksweat · Jul 10, 2016

I use a 10.0uvb reptile tube.definitely makes a difference.I've done side by sides with and without.um sticking with em anyway.I want a uva clean light now.

SilentL · Jul 14, 2016

I smoked my first grown bud's ( with uv added specially ) today with several weeks with uva-uv-b.
And I can say Yes real nice joint(s) .
I look at them with 10-80 x and the tricomes are dense.
a lot of them milky, Couldn't wait had to test a branch :) . 5-10 days early , nice effect though energizig and uplifting and most imortant for me my back/neck pain almost vanish. ( car accident ).
Yes theese bulbs for lizards with uvb I think they are real good. I found them on another site. Much better price and shipment so I think I'll gonna try one of theese, the other light the plant's like and one cfl with uvb in the middle of the sacred ground , must be good.
Keiksweat : Look after blacklights they are used in disco etc.... suggestion..

keiksweat · Jul 14, 2016

glad you tried n tested the uv mate.ive got mine off at the moment.too much heat,so had to move everything that's not essential .should be good in a few days.whats the deal with these black disco lights then?are they of the uv spectrum or something different?have you got a picture.thanks.

SilentL · Jul 15, 2016

keiksweat said:
glad you tried n tested the uv mate.ive got mine off at the moment.too much heat,so had to move everything that's not essential .should be good in a few days.whats the deal with these black disco lights then?are they of the uv spectrum or something different?have you got a picture.thanks.

Pictures two of them I wrote 6 jul. I ordered two blacklights
( if I want only change to white and then use them for seedlings or clones. ) , I really don't know how much uv-b there is , different info ( probably because different manufactures and different specifications ). but I'm almost sure that there is more uva than uvb. It should be so, uvb has disadvanteges if you are exposed to much. Most of us who writes here know that , probably , why not mentioned it again because some doesn't think so much.
As you can se I put the lights behind a net. And with 40 w extra it about 3,5 % - 5% of my light in watts. I had 60w before , maybe overkill. so 40 w and test, before 20w .
If you want another info just ask.
What distance and how much do you turn your plant's agaist the uvb-bulb? and whole flowering or some weeks? .

Purpletrain · Jul 20, 2016

personally if you think its does better then all the power to you maybe try MH and HPS combo

Ignignokt · Jul 20, 2016

Turns out there was a tremendous number of research studies regarding UV effect on plant growth ( mostly food crops ) as a result of the Ozone hole problem. UV-C was the concern however the measured UV radiation increase was broadband in the UV spectrum.

Here is a research paper I found compelling:
http://onlinelibrary.wiley.com/doi/10.1111/j.1751-1097.2004.tb00013.x/full

I would also note there is a startup in New Zealand that specializes in custom designed UV treatments for seedlings - this apparently makes a significant difference in later expression and disease resistance.

http://www.biolumic.com

I found the work done in the UK by reptile researchers and owners on getting consistent measurements of the wavelengths of interest in the UV-B and UV-A region important. Measuring allows consistency from crop to crop.

http://www.uvguide.co.uk/usinguvmeter.htm

SilentL · Jul 23, 2016

Purpletrain said:
personally if you think its does better then all the power to you maybe try MH and HPS combo

Yes maybe your'e right , what is best really don't know myself , but if you should buy everything now one setup , yes hps and mh best option.
For me I need my meds and for other use to of course. :) . This is also my hobby and I want to try different things . And when the weed get real great I'm HAPPY. :) . maybe a close friend to :) ( because I'm happy ).
Grow on ...
If you run only Led then you may have more use of uv-a , and b.
MH do send out some uv enough probaly.
HPS to but if you use Cooltube they can filter away some uv ( the small amout they send out ).
The last i know some agree some not , who knows for sure . ? Anyway grow more...

SilentL · Jul 24, 2016

https://www.thcfarmer.com/community/threads/led-or-hps-sea-of-green.65417/

I put in a link there more about setup with heat problem and chois

Purpletrain said:
personally if you think its does better then all the power to you maybe try MH and HPS combo

Thanks for reminder , Before I run HPS and MH , maybe the easiest would been to use 250w MH in top before adding spec uv ? Now I can test both :)

GT21 · Jul 27, 2016

SilentL said:
Thats real nice , that's how I first wanted to do but I had to buy from Germany the TCL-uv's. Only two kinds of uv bulbs where I live. One of them produced to little uv-b so Thats why I bought TCL ( TCL I can change 6 $ , bulb good here 25 $ and cost for transport ). Little bit trickier to hang up but as you can se very simple , doesn't look perfect but the plant's will produce more THC to ME :) .
ref: ( Swedish agricultural university ) uv-b increase THC
I belive in broad spectrum so it's HPS CFL TCL LED so from UV-B to Infrared

Look for reptisun 10.0 on amazon. They are for lizards... and the cheapest i have found and easiest to hang

I use them from about week 2 (after stretch) all the way through flower and i keep them withing 12 inches of the canopy

GT21 · Jul 27, 2016

Toaster79 said:
UV spectrum increases THC-V not THC. If you want a good UV-A/B light, look into reptile lights. Trixie Desert Pro 12.0 puts out 12% UV spectrum. Can't beat that.

Oh thats a little better yet... 12.0s

Heres some outdoor then indoor.. as far as trich production and maturity.. you would never tell the difference. And you can do it with any nutes.

Ignignokt · Jul 27, 2016

GT21 said:
Look for reptisun 10.0 on amazon. They are for lizards... and the cheapest i have found and easiest to hang

I use them from about week 2 (after stretch) all the way through flower and i keep them withing 12 inches of the canopy

Got mine via Walmart - 46" T5HO for about 28$ each plus shipping. Shop around.

Ignignokt · Jul 27, 2016

I selected the reptisun lamps because they are made in volume (cheap) and seem to have the right spectrum that includes UV-A in the correct ratio to UV-B and some significant output in the blue spectrum. I figure the references I provided may be a bit on the TL;DR side for many folks - however the specifics are there - and apply to the fruit (flowering) stage of cannabis: UV-B causes specific responses, not unlike low-stress training (LST) . UV-A is *required* to fix the damage created by UV-B (reactivation) - longer wavelength blue is also needed as part of the (obvious) evolutionary adaption.

There are two basic evolutionary adaptions present in many plants that are present in cannabis. The first is this adaption to survive and cope with various light conditions due to latitude or the filtering condition of the atmosphere ( Ozone layer filtering of short wavelengths like UV-C and to a large degree UV-B) as well as the well-known PAR spectrum ( There is a thing such as "Too much light" - see:How Much Light Is Too Much? )

The second adaption is to excess atmospheric CO2. This comes from the time of the PETM event - The reason why our plants will likely outlive any insult we do to the planet - https://en.wikipedia.org/wiki/Paleocene–Eocene_Thermal_Maximum - As many in the greenhouse business have long known, CO2 is a tool that can be used when adequate light is available.

I think it is important to note - these are not things beginners should try - it only confuses the already confused. You need to be an accomplished plant grower/observer with a stable environment before adding advanced techniques such as CO2 supplementation. In my experience, the introduction of CO2 generates humidity issues from increased transpiration. I simply added a dehumidifier and that solved the issue.

I haven't found any consistent advice for UV spectrum exposure for cannabis as yet - I think I may have to figure that out on my own.

SilentL · Jul 30, 2016

Ignignokt said:
I selected the reptisun lamps because they are made in volume (cheap) and seem to have the right spectrum that includes UV-A in the correct ratio to UV-B and some significant output in the blue spectrum. I figure the references I provided may be a bit on the TL;DR side for many folks - however the specifics are there - and apply to the fruit (flowering) stage of cannabis: UV-B causes specific responses, not unlike low-stress training (LST) . UV-A is *required* to fix the damage created by UV-B (reactivation) - longer wavelength blue is also needed as part of the (obvious) evolutionary adaption.

There are two basic evolutionary adaptions present in many plants that are present in cannabis. The first is this adaption to survive and cope with various light conditions due to latitude or the filtering condition of the atmosphere ( Ozone layer filtering of short wavelengths like UV-C and to a large degree UV-B) as well as the well-known PAR spectrum ( There is a thing such as "Too much light" - see:How Much Light Is Too Much? )

The second adaption is to excess atmospheric CO2. This comes from the time of the PETM event - The reason why our plants will likely outlive any insult we do to the planet - https://en.wikipedia.org/wiki/Paleocene–Eocene_Thermal_Maximum - As many in the greenhouse business have long known, CO2 is a tool that can be used when adequate light is available.

I think it is important to note - these are not things beginners should try - it only confuses the already confused. You need to be an accomplished plant grower/observer with a stable environment before adding advanced techniques such as CO2 supplementation. In my experience, the introduction of CO2 generates humidity issues from increased transpiration. I simply added a dehumidifier and that solved the issue.

I haven't found any consistent advice for UV spectrum exposure for cannabis as yet - I think I may have to figure that out on my own.

Nice information, thanks

GT21 · Jul 30, 2016

Ignignokt said:
Got mine via Walmart - 46" T5HO for about 28$ each plus shipping. Shop around.

I think the ones i get are about 20 bucks on amazon.. i have been to a pet store and they mark them up to 30 bucks a bulb.

Ignignokt said:
I selected the reptisun lamps because they are made in volume (cheap) and seem to have the right spectrum that includes UV-A in the correct ratio to UV-B and some significant output in the blue spectrum. I figure the references I provided may be a bit on the TL;DR side for many folks - however the specifics are there - and apply to the fruit (flowering) stage of cannabis: UV-B causes specific responses, not unlike low-stress training (LST) . UV-A is *required* to fix the damage created by UV-B (reactivation) - longer wavelength blue is also needed as part of the (obvious) evolutionary adaption.

There are two basic evolutionary adaptions present in many plants that are present in cannabis. The first is this adaption to survive and cope with various light conditions due to latitude or the filtering condition of the atmosphere ( Ozone layer filtering of short wavelengths like UV-C and to a large degree UV-B) as well as the well-known PAR spectrum ( There is a thing such as "Too much light" - see:How Much Light Is Too Much? )

The second adaption is to excess atmospheric CO2. This comes from the time of the PETM event - The reason why our plants will likely outlive any insult we do to the planet - https://en.wikipedia.org/wiki/Paleocene–Eocene_Thermal_Maximum - As many in the greenhouse business have long known, CO2 is a tool that can be used when adequate light is available.

I think it is important to note - these are not things beginners should try - it only confuses the already confused. You need to be an accomplished plant grower/observer with a stable environment before adding advanced techniques such as CO2 supplementation. In my experience, the introduction of CO2 generates humidity issues from increased transpiration. I simply added a dehumidifier and that solved the issue.

I haven't found any consistent advice for UV spectrum exposure for cannabis as yet - I think I may have to figure that out on my own.

As far as consistent advice on exposure.. they have many references on the % of uvb you want but they dont have a specific way to use them. I use them all day with the other hps. I know at dusk and dawn the uv is a lot less but we still get some exposure anytime the sun is out. Then youll hear others just use it an hour per day... others will use it last 2 weeks of flower.

Uv Light??

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