Jaz
Well-Known Member
Pulsing UV-B in the last few weeks to get your plants producing more oil to protect themselves, brings out more terpenes, etc.
j
Which UVB lights to get?
- Thread starter Hell Awaits
- Start date
Pulsing UV-B in the last few weeks to get your plants producing more oil to protect themselves, brings out more terpenes, etc.
j
Jaz
Well-Known Member
Emilya Green said:
How is he advocating the use of the UVB?
Small amounts
best quality at the moment is from fluorescents
reptile bulbs do not produce UVB in the same quantity/ratio as you don't want to sunburn your reptiles
Apply it in bursts, toward the last 2-3 weeks of flowering, increases the secondary metabolytes (flavour/colour compounds/terpenes) and plant ruggedness
Pulsed UV far more effective than steady state, steady state produced UV blocking pigments in the cuticle.
On one day, off the next day
The vids below provided more info on how to use:
His 310 UVB light is quite intense so he sets the fluoro tube 40cm (16/18 inches in the old scale) above and perpendicular to his LED bars, the UV light being 60cm (2 feet or so) above the plant canopy.
Don't spend time under the lamp you will get a sunburn so switch it off when working in the grow room.
Timing and dosage, he recommends:
Last 3 weeks of flowering for photos, last 2 weeks for autos to stimulate oil production which in effect does slow down growth in terms of mass, you have a trade-off of energy going into flavinoid production rather than growth.
A couple of hours per light cycle of flowering, unfortunately he doesn't mention what part of the light cycle (start, finish, midday or intermittent throughout).
Dutch Passion, one of the worlds oldest seedbank companies, has tested the MIGRO UVB to determine the effect on terpene levels.
They ran a controlled test in a side by side grow, one side with UVB, one without. There was a 19% increase in terpene levels under the UVB fixture, some terpenes increasing by almost 50%.
Increased terpenes mean increased flavour and smell. Research also indicates increased terpene levels can lead to a more complex and satisfying effect when consumed.
Link to the full Dutch passion blog post here:
How to increase terpene levels in cannabis plants
Everything you need to know about terpenes:
Everything you need to know about terpenes
j
How is he advocating the use of the UVB?
Small amounts
best quality at the moment is from fluorescents
reptile bulbs do not produce UVB in the same quantity/ratio as you don't want to sunburn your reptiles
Apply it in bursts, toward the last 2-3 weeks of flowering, increases the secondary metabolytes (flavour/colour compounds/terpenes) and plant ruggedness
Pulsed UV far more effective than steady state, steady state produced UV blocking pigments in the cuticle.
On one day, off the next day
The vids below provided more info on how to use:
His 310 UVB light is quite intense so he sets the fluoro tube 40cm (16/18 inches in the old scale) above and perpendicular to his LED bars, the UV light being 60cm (2 feet or so) above the plant canopy.
Don't spend time under the lamp you will get a sunburn so switch it off when working in the grow room.
Timing and dosage, he recommends:
Last 3 weeks of flowering for photos, last 2 weeks for autos to stimulate oil production which in effect does slow down growth in terms of mass, you have a trade-off of energy going into flavinoid production rather than growth.
A couple of hours per light cycle of flowering, unfortunately he doesn't mention what part of the light cycle (start, finish, midday or intermittent throughout).
Dutch Passion, one of the worlds oldest seedbank companies, has tested the MIGRO UVB to determine the effect on terpene levels.
They ran a controlled test in a side by side grow, one side with UVB, one without. There was a 19% increase in terpene levels under the UVB fixture, some terpenes increasing by almost 50%.
Increased terpenes mean increased flavour and smell. Research also indicates increased terpene levels can lead to a more complex and satisfying effect when consumed.
Link to the full Dutch passion blog post here:
How to increase terpene levels in cannabis plants
Everything you need to know about terpenes:
Everything you need to know about terpenes
j
The Butcherbird
420 Member
ONE thing I know about UV is it starts about 9am and thru to 3pm , that's for sun when levels damage humans, nearly every day, so I'll keep to those guidelines, on this grow, then the experiment begins
jimihendrix58
Active Member
The only bulb that I know of that goes down to 280nm is the Solacure Flower Power bulb. It has special glass, and is not cheap. It also has a built in reflector. Conventional Fluorescent reflectors wont reflet the light, and UVB/A is very poorly reflected.
The flower power bulb is most powerful from 280nm-320nm.
Another bulb that goes down to 290nm is the Agromax, but it still doesnt go down to 280nm. It goes down further than any other bulb I know of, other than the Solacure.
The Solacure is 20w, but can be run as high as 100w. It is highly overbuilt.
I use the Solacure F32/F40 fixture, and run them at 32w.
They recommend using 2 of them in a 4 x 4 area, and with either a 1000w HID, or equivalent LED, which would be about 645w. Run at a distance of 2 feet. The higher you run them, the longer they need to run, and of course the closer they are, the less they need to be run.
I myself start seedlings with mine, all the way through harvest and a 1000w Hortilux HPS at 2 feet. I run them 4 hours per day. I figure they get UVA/B outside from seedling - harvest, so why not inside? You can also email the guy that owns the business, and he is very helpful, and knowledgable.
This bulb is about 20x more powerful that the best reptile bulb, which is the Arcadia Desert Dragon bulb. The Desert Dragon is 7500k, and the Solacure is 10,000k.
The flower power bulb is most powerful from 280nm-320nm.
Another bulb that goes down to 290nm is the Agromax, but it still doesnt go down to 280nm. It goes down further than any other bulb I know of, other than the Solacure.
The Solacure is 20w, but can be run as high as 100w. It is highly overbuilt.
I use the Solacure F32/F40 fixture, and run them at 32w.
They recommend using 2 of them in a 4 x 4 area, and with either a 1000w HID, or equivalent LED, which would be about 645w. Run at a distance of 2 feet. The higher you run them, the longer they need to run, and of course the closer they are, the less they need to be run.
I myself start seedlings with mine, all the way through harvest and a 1000w Hortilux HPS at 2 feet. I run them 4 hours per day. I figure they get UVA/B outside from seedling - harvest, so why not inside? You can also email the guy that owns the business, and he is very helpful, and knowledgable.
This bulb is about 20x more powerful that the best reptile bulb, which is the Arcadia Desert Dragon bulb. The Desert Dragon is 7500k, and the Solacure is 10,000k.
The Butcherbird
420 Member
I've been thinking along the same idea about what they receive in nature and trying to focus on peak times, UVA seems to be there all the time but peaks 3 hrs before and 3 hrs after midday regardless of the season. So I'll run it at 100% during those times and 50% - 75% for the rest of the 18 or 12 hours.
Now seeing the evidence that too much UVB does to the terms, I'll remain using it to the standard 2hrs before and after midday for the last 3 week's.
I really want to try so many theories out except to really prove it I'm going to do things twice without any other variables barring weather extremes and unforseen power outages.
Now I don't have the coin to run the optimal climate control but nature is in the same boat as well so I'm trying to replicate nature not tweek something that's taken a coupla million years of natural selection to refine and it's in human nature to want everything yesterday and time is your enemy, so let's face it,fads will always come and go but tried and tested facts are your best tool, until science discovers different different.
With that in mind I'll do a bit of Frankensteining when I've had a major stuff up and I'm too far down the line to start again and I wished I took pics of some of the freak alien malfunctions I've seen, now I don't need pics anymore just to see what happens when you try to "ENHANCE NATURE" thru experiments, but mainly because I don't have the time or money to maintain my wonderfully content life as a drug addict. It's good to see the correlation between pot and addiction seems to becoming less and less the more the taxman discovers the billions that semi-legalization recovers. So much for the moral standards they invented to get petrochemical/ fertilizer/ cotton industry off the ground and that's without mentioning the alcohol industry. Funny that I can say to my ageing parents, " you used to say I was a conspiracy theoriest and would say anything to justify feeding that filthy addiction and I need to see a medical specialist to cure me,,,, is that the same doctor who now hands out that filthy dope inorder for me to handle the sheep mentality that you good parents inflicted upon me as a teenager. Mum Dad I'm sorry to say you were the unfortunate victim of a US led propaganda machine to make a few people the wealthiest families on the planet, and making me feel like the baddest human , in your eyes, but don't worry you're not alone, a simple "sorry bout that" is the right thing to say at a time like this . Hahaha "
Now seeing the evidence that too much UVB does to the terms, I'll remain using it to the standard 2hrs before and after midday for the last 3 week's.
I really want to try so many theories out except to really prove it I'm going to do things twice without any other variables barring weather extremes and unforseen power outages.
Now I don't have the coin to run the optimal climate control but nature is in the same boat as well so I'm trying to replicate nature not tweek something that's taken a coupla million years of natural selection to refine and it's in human nature to want everything yesterday and time is your enemy, so let's face it,fads will always come and go but tried and tested facts are your best tool, until science discovers different different.
With that in mind I'll do a bit of Frankensteining when I've had a major stuff up and I'm too far down the line to start again and I wished I took pics of some of the freak alien malfunctions I've seen, now I don't need pics anymore just to see what happens when you try to "ENHANCE NATURE" thru experiments, but mainly because I don't have the time or money to maintain my wonderfully content life as a drug addict. It's good to see the correlation between pot and addiction seems to becoming less and less the more the taxman discovers the billions that semi-legalization recovers. So much for the moral standards they invented to get petrochemical/ fertilizer/ cotton industry off the ground and that's without mentioning the alcohol industry. Funny that I can say to my ageing parents, " you used to say I was a conspiracy theoriest and would say anything to justify feeding that filthy addiction and I need to see a medical specialist to cure me,,,, is that the same doctor who now hands out that filthy dope inorder for me to handle the sheep mentality that you good parents inflicted upon me as a teenager. Mum Dad I'm sorry to say you were the unfortunate victim of a US led propaganda machine to make a few people the wealthiest families on the planet, and making me feel like the baddest human , in your eyes, but don't worry you're not alone, a simple "sorry bout that" is the right thing to say at a time like this . Hahaha "
