M
Mallory Potbag
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The spectrum won't alter, but the intensity will greatly improve with new bulbs. I change the lights at bare minimum once a year. You will notice a difference. To increase resin and THC production remember to supplement with the UVB portion of the spectrum using either unshielded Metal Halides or specialty reptile bulbs.
for someone who is pushing 1000Watts like myself would you reccommend using a MH 1000W in VEG then switch to the 1000W HPS during flower?
Thanx DR.
--AO
1000% on mh on veg...., if you can, last two weeks of flower use as well and you will see a difference in frosty goodness!
PS. Change bulbs at least once a year for best production about every third cycle is what has always been rwcomended
"UVB spectral inclusion is critical to resin production and THC percentage."-Dr. Detroit
my plants with no UVB are resin machines as you can see UVB was not critical and I can comment on the THC because I smoked it, it was right up there with anything I get from clubs,friends or my outdoor.
.... trichomes are a good indicator of THC but your right about it not necessarily meaning its high in THC, my point is you DONT need UVB to bust out high quality high THC meds, no one ever complains about my stuff lacking any power, in fact its the opposite. And yes I have bloomed with HPS and MH.
also my cabin is at 4700 feet in the mountains lot of UVB there and my outdoors are not any better then my indoors potency wise just from my personal observation I don't think its as huge of a factor as some people are trying to make it, reminds me of people painting there floors white to get that .01 growth increase wile i cant argue it wont help its just not worth it most growers.
Actually altitude from sea level would be fairly irrelevant to UVB levels, though latitude is quite important to them. It's why feral plants at the equator are so much more THC dominant than those at higher latitudes: UVB proportion. You're at a relatively high latitude to grow exceptional cannabis outdoors compared to say, The Congo or Columbia...
This guy runs down the peer-reviewed article fairly concisely:
Go and buy a cheap reptile CFL and point it at a particular bud for a few weeks prior to harvest and then tell me that UVB plays no role. It's easily observable by anyone if you don't believe me.
no noticeable different in yield, however the buds were def more frosty, one nug was getting both spectrum on it kinda right in the middle between the HPS and MH and you could see a line of frost right in the middle like a shadow might make, I was trippin' when I saw it, made a believer out of me. I ran a perpetual in which 1 light of 8 was an MH, last two weeks of any plants life in the room was spent under that MH and I had frosty buds in the end, only did two runs like that tho, so maybe it was just lucky for me, in my current garden it is not set up to do this without switching out bulbs and it's not going to be done just yet just because it's a large job and I don't have the time or energy just yet to start back to doing it, when it was one light constantly on in the room like it was, it was cool.
Once agin my out doors are still not any stronger then my indoors
ONCE AGIN!
"UVB spectral inclusion is critical to resin production and THC percentage."-Dr. Detroit
I proved you wrong with a simple picture real proof (they say a 1000 words you know) not some lame ass study you pulled out of your ass and have no real personal experience in.
your statements that UVB is critical are way over exaggerated and shows how little you really know, I showed how UVB was critical in no way to my resin and THC production with actual proof you can see. you can keep your reptile light, ill continue to grow my frosty dank. while you toss your money down the trash.
and if what your saying is true post a picture of your UVB buds I would love to see what it does to there resin and THC production if its so critical.
Not only that lets see what the peer review said I doubt you read it other wise you would have not used this to defend yourself since it backs ME up.
"I can't really say for certain what kind of effects UV-B would have on your plants. I just kept finding research about it as I looked into it. It would seem that UV-B was important to get cannabis to create a compound like cannabinoids, but I can't say if it is really that important now."
"Just to let you all know that this was written in 2004, and I have learned a lot since then, and somewhat revised my ideas about this. I should edit it, but didn't have the time right now. Maybe sometime soon."-2010
"Just as a strange side-note, while trying to find a copy of David Pate's dissertation, I just found out that he works for Hortapharm! That is Sam Skunkman's company, and when discussing this article, Sam had said that he did an experiment with Pate that was never published where they found no increase in THC from UV-B exposure (and the only scientific paper I've ever read that reported no change in drug-type varieties). I'm not sure what to make of this, yet, but I do find it a little interesting.
(edit)It also looks like he wrote a chapter for the book Advances in Hemp Research, published in 1999, titled "The Phytochemistry of Cananbis: It's Ecological and Evolutionary Implications". The title sounds a lot like mine, and I was able to read some of the pages from Google, but it is incomplete. He says in it explicitly, citing the Lydon '87 article I wrote an excerpt of the abstract above:
Quote:Their experiments demonstrate that under conditions of high UV-B exposure, drug-type Cannabis produces significantly greater quantities of THC.
I find it strange that David Pate wrote this, when Sam Skunkman says that they did an experiment together that showed no difference. Hell, Pate's Ph.D. dissertation was all about the effects of light on Cannabis. Something is not adding up."
"Nevil
I did experiments with UV light. I described it somewhere. Plants burn unless they are conditioned to it. I found no increase in potency or change in the character of the high. It's a dead horse.
N."
ill take real experience over bullshit papers anyday.
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