UVA/UVB the real deal. A must read topic for all growers.
- Thread starter GreenVet
- Start date
GreenVet
Well-Known Member
I'm not to worried, i don't plan on hanging out under my lights to get a tan. When i'm in the room i'm not under my lights, my plants are. It would take a whole lot of UV bulbs to produce a dangerous amount of UV or atleast several and you would have to live in the room with your plants. The sun puts off more UV then these lights, I under stand the UV can be very intense very close to the light but again, i'm not sitting under my lights, a had or arm here and there for a second or 2, nothing anyone should worry about.
KUShSOurSMOKEr
Well-Known Member
Nicee those were chocoloupe? Nicee smoked that its niceeeeeeeGasstanker niceee clean ass set up wit da 4 uvs on each side sick as fuckkkI'm thinkin bout runnin some for suree next run What store do they sell uv reptile lights at? Target.walmart etc.??
Gastanker
Well-Known Member
Thanks. 3 of the plants were chocolope and the rest varied. I price shopped online for the best dead on my bulbs.
Ended up picking up two of these.
http://www.reptileuv.com/megaray-sb-275-watt-self-ballasted-flood-uvb-lamp.php
I grow vertical, only way to grow indoor trees
so figured I'll put one on each end of the room. Take it to the test.
Brick Top
New Member
Research has proven that strains grown in areas of higher UVB rays create more trichomes and higher percentages of THC. Plants of the same strain grown at higher altitude will have more trichomes and higher level of THC than those grown at lower altitude. The difference in increased levels of UVB light rays at altitude. The same was found about strains grown in the equatorial region compared to when grown in area with less UVB lighting.
The best source of UVB lighting I know of comes from Mega-Ray reptile lights. I like the 120 volt self ballasted ones myself.
http://www.reptileuv.com/megaray-products.php
The best source of UVB lighting I know of comes from Mega-Ray reptile lights. I like the 120 volt self ballasted ones myself.
http://www.reptileuv.com/megaray-products.php
IntrepidTraveler420
Member
Put in two 10. Desert Reptile UVB 26w bulbs in 33 days into flowering on my 1st grow. 1st grow yeah, but I’ve seen my fair share of fire and I’m pretty certain those lights were the cause of it.
Scope some
Scope some
AKronic
Active Member
In this months issue of High Times they did an article on the use of UV light and found it didnt make all the plants more potent or more crystals it was more like strain specific. the best type of light bulb for UV light are the ones they use in tanning beds. they put off shit loads of UV light. more expensive and harder to find than reptile lights
mccumcumber
Well-Known Member
The sun spits out a bunch of UV waves so it makes sense that it would be beneficial.
Brick Top
New Member
Where they what are called the "high pressure" lights, the specialized quartz lamps or the standard fluorescent bulbs with phosphor in them? I had read that tanning lights are good, but the fluorescent bulb type suffer what ever type of fluorescent lighting suffers from, a lack of penetration. Another problem with tanning light bulbs, at least many of them, is their length does not fit many people's situations. That's what makes reptile lighting a better choice for most. Size and flexibility of use in differing situations, and also with the floodlight styles you get far better penetration, especially from the higher wattage ones.
While I had read things similar to what you mentioned I am unsure why it is the case. Tanning bed lights put out mainly UVA light, but from everything I have read it is UVB that is mainly responsible for cannabinoid creation.
THC and other cannabinoids are produced mostly in one place on the cannabis plant:
inside the heads of the capitate-stalked trichomes. Organelles produced by the plant called Vacuoles - which contain phenols, a chemical compound similar to alcohol and another type of organelle called plastids - containing hydrocarbons called terpenes, make their way up the trichome stalk and combine inside the secretory cavity into a fibrous mat. This concentrated mat is hit by UVB light waves, causing the creation of cannabinoids.
That would make one tend to think that UVB rays would be more what someone would want to add to their lighting than UVA rays, and as mentioned, tanning bed lighting mainly, like over 95% if I remember right, puts out UVA rays and puts out little UVB rays. At least the ones I have read about anyway that meet the laws that some or most states, if not all, now have that put limits on how much harmful UVB light rays tanning beds can give off. I might be wrong but I believe, at least in some states, it is limited by law to only 3% UVB light rays allowed.
I might have to pick the latest copy and see if something new has been discovered making everything I have read inaccurate or how and why UVA rays are more important than UVB rays.
dman8168
Well-Known Member
mmmm i dont know if i can believe this as fact
This concentrated mat is hit by UVB light waves, causing the creation of cannabinoids.
If this statement were true then that would mean that people growing under indoor conditions,with cfls,t5's etc, with litlle to no uvb rays that they should have little to no trichs. this would include all the current lighting i believe.and ive seen and produced some highly frosted bud without uvb or very little.Now as stated it may increase the creation of cannabinoids as the grow showed,but i find it hard to believe its the ONLY reason,as the above statement claims. and i really like a good discussion and am not trying to start a fight.just thinking about this in a logical way....i think
This concentrated mat is hit by UVB light waves, causing the creation of cannabinoids.
If this statement were true then that would mean that people growing under indoor conditions,with cfls,t5's etc, with litlle to no uvb rays that they should have little to no trichs. this would include all the current lighting i believe.and ive seen and produced some highly frosted bud without uvb or very little.Now as stated it may increase the creation of cannabinoids as the grow showed,but i find it hard to believe its the ONLY reason,as the above statement claims. and i really like a good discussion and am not trying to start a fight.just thinking about this in a logical way....i think
NiKEUS
Well-Known Member
even plain ol' hps' put out a little uvb, mh's and cmh's tend to put out more.
Brick Top
New Member
This is only one of many articles I have read on the subject, and also read in books. But hey, they might all have been wrong.
Inside the Trichome
By Bubbleman and Jeremiah Vandermeer, Cannabis Culture - Thursday, June 11 2009
If youve seen pictures of mature cannabis plants taken with a macroscopic lens thats zoomed-in very close, then youve undoubtedly noticed the many glistening translucent resin glands protruding from the buds, leaves, and just about everywhere else on the plant (see Stalking Trichomes, CC #72). Most marijuana growers and readers of pot magazines are quite familiar and some downright obsessed with these resinous outgrowths known as trichomes. You may have also read that the sticky coating of trichomes is home to the active ingredients in cannabis the stuff that gets you high and has all the medical benefits tetrahydrocannabinol (THC), cannabidiol (CBD), and other cannabinoids. But have you ever wondered exactly what the trichomes do for the cannabis plant, or what biological purpose they serve?
Sticky resinous growths knows as trichomes are home to the active ingredients in cannabis. (Click picture to enlarge)Evolution of TrichomesIn nature, only the strong survive, and it is hypothesized by biologists that trichomes evolved as a defense mechanism of the cannabis plant against a range of potential enemies (1). Trichomes, from the Greek meaning growth of hair, act as an evolutionary shield, protecting the plant and its seeds from the dangers of its environment, allowing it to reproduce. These adhesive sprouts form a protective layer against offensive insects, preventing them from reaching the surface of the plant. The chemicals in the trichomes make cannabis less palatable to hungry animals and can inhibit the growth of some types of fungus. The resin also helps to insulate the plant from high wind and low humidity, and acts as a natural sun-screen in protecting against UV-B light rays. But since trichomes contain euphoric properties attractive to humans, it may be man who has had the most influence on the plants development through many years of favoring strains that consistently produce more of these gooey resin heads.
Trichome Types
Trichomes grow in numerous shapes and sizes on many types of plants. The cannabis plant has developed three main types (from NationMaster Encyclopedia):
Bulbous: This type is the smallest (15 to 30 micrometers). From one to four cells make up the foot and stalk, and one to four cells make up the head of the gland. Head cells secrete a resin, presumably cannabinoids, and related compounds that accumulate between the head cells and the cuticle. When the gland matures, a nipple-like protrusion may form on the membrane from the pressure of accumulating resin. The bulbous glands are found scattered about the surfaces of the aboveground plant parts. [Pictured below.]
Capitate-Sessile: The second type of gland is larger (25 to 100 micrometers) and more numerous than the bulbous glands. They are called capitate, which means having a globular-shaped head. On immature plants, the heads lie flush, appearing not to have a stalk and are called capitate sessile. They have a stalk that is one cell high, although it may not be visible beneath the globular head. The head is composed of usually eight, but up to 16 cells, that form a convex rosette. These cells secrete cannabinoids and related compounds that accumulate between the rosette and its outer membrane. This gives it a spherical shape.
Capitate-Stalked: Cannabinoids are most abundant in the capitate-stalked glands, which consists of a tier of secretory disc cells subtending a large non-cellular secretory cavity. During flowering, the capitate glands that appear on the newly formed plant parts take on a third form. Some of the glands are raised to a height of 150 to 500 micrometres when their stalks elongate. These capitate-stalked glands appear during flowering and form their densest cover on the female flower bracts [specialized leaves that cover the seeds]. They are also highly concentrated on the small leaves that accompany the flowers. The male flowers have some stalked glands, but they are smaller and less concentrated than on the female. (2)
Cannabinoids
Cannabinoids are a group of chemical compounds that occur naturally in the cannabis plant, first discovered in the 1940s. When consumed by humans, the chemicals bind to CB1 and CB2 cannabinoid receptors in the brain and body, causing euphoria and other effects. The broader definition includes three general types: phytocannabinoids, which occur uniquely in the cannabis plant; endogenous cannabinoids, produced by the bodies of humans and other mammals, birds, fish, and reptiles; and synthetic cannabinoids, which are related compounds produced in laboratories. Cannabinoids present in the cannabis plant include THC, CBD, cannabinol (CBN), cannabichromene (CBC), cannabigerol (CBG), and tetrahydrocannabivarin (THCV).
Inside the TrichomeTHC and other cannabinoids are produced in only one place on the cannabis plant: inside the heads of the trichomes. How it happens: Organelles produced by the plant called Vacuoles which contain phenols, a chemical compound similar to alcohol [pictured at right in blue], and another type of organelle called plastids containing hydrocarbons called terpenes [red], make their way up the trichome stalk [green] and combine inside the secretory cavity into a fibrous mat [yellow]. This concentrated mat is hit by UV-B light waves, causing the creation of cannabinoids. Since all of the psychoactive ingredients are produced inside the trichome, these tiny resin hairs have long been sought after by hash and oil makers and can be separated from the plant and harvested in a variety of ways (3).
Potency and Tricomes
Many media outlets and politicians say the potency of todays pot has increased dramatically in the last 30 years, claiming it contains anywhere from 10%-40% THC. Most are dubious claims, as it is quite obvious that a sample of herbal plant material does not consist of nearly half THC, but there is still much debate on the issue of potency classification. One thing is for sure; heavy trichome production does not necessarily mean higher potency, because the resins inside the trichome may or may not contain high levels of THC and other active ingredients. Some speculate that the percentage levels refer to the amount of THC in the oils produced inside the resin glands, but new studies show that cannabinoids other than THC also have distinctive effects on brain functions and cause correspondingly different effects on human cognition and psychiatric symptoms (4). This makes gauging the potency or strength of cannabis plants very difficult, as different cannabinoid level combinations may induce different types of highs. (For more information, see Pot Potency CC #34.)
[h=1]The writer's own experience allow for a more specific conclusion: If the UVB photon is missing from the light stream(a), or the intensity as expressed in µW/cm2 falls below a certain level(b), the phytochemical process will not be completely energized with only UVA photons which are more penetrating but less energetic, and the harvested resin spheres will have mostly precursor compounds and not fully realized THC(c). [/h]
devk
Active Member
Thank you dman8168
There is always negative and positive things in order to make something work
Brick Top of course would eazyly show where the information has been gathered..The video from the first post was also the same kinda info ..Thank you guys
I look at this issue simply... Kinda like...White and Whole Grain Bread......Yes you can survive off of the white bread,,,looks good taste good ...But your not getting the whole grain.......
GreenVet
Well-Known Member
very well said easy for anyone to understand
Brick Top
New Member
The effect of ultraviolet radiation on the accumulation of medicinal compounds in plants
Wen Jing Zhanga, b and Lars Olof Björna, c, ,
aLund University, Department of Cell and Organism Biology, Sölvegatan 35, SE-22362 Lund, Sweden
bQingHai Normal University, Key Laboratory of Resources and Environment in Qinghai-Tibet Plateau, Ministry of Education, Qinghai 810008, China
cKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, China
Received 8 January 2009; accepted 11 February 2009. Available online 23 February 2009.
Abstract
A review is given of how the production by plants of compounds useful as medicines or raw materials for manufacture of medicines is influenced by ultraviolet radiation, particularly by UV-B radiation (280315 nm wavelength). The compounds considered in this review are flavonoids and other phenolics, alkaloids (especially indole terpenoid and purine alkaloids), essential oils and other terpenoids, cannabinoids, glucosinolates and isothiocyanates, and compounds having human hormone activity. A short account is also given of ultraviolet signalling in plants. The review concludes with a discussion of the possible evolutionary mechanisms that have led to the evolution of UV-B regulation of secondary metabolite accumulation.
Wen Jing Zhanga, b and Lars Olof Björna, c, ,
aLund University, Department of Cell and Organism Biology, Sölvegatan 35, SE-22362 Lund, Sweden
bQingHai Normal University, Key Laboratory of Resources and Environment in Qinghai-Tibet Plateau, Ministry of Education, Qinghai 810008, China
cKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, China
Received 8 January 2009; accepted 11 February 2009. Available online 23 February 2009.
Abstract
A review is given of how the production by plants of compounds useful as medicines or raw materials for manufacture of medicines is influenced by ultraviolet radiation, particularly by UV-B radiation (280315 nm wavelength). The compounds considered in this review are flavonoids and other phenolics, alkaloids (especially indole terpenoid and purine alkaloids), essential oils and other terpenoids, cannabinoids, glucosinolates and isothiocyanates, and compounds having human hormone activity. A short account is also given of ultraviolet signalling in plants. The review concludes with a discussion of the possible evolutionary mechanisms that have led to the evolution of UV-B regulation of secondary metabolite accumulation.
FootClan
Well-Known Member
I read that article in high times aswell and it did indeed say that UVB rays was over rated and that you are better off getting more potency by munipulating the genetics not by destroying the cells with UVB...It talked about how the UVB kills all living cells and it can be harmful to your plants.... Talks about how the main study for this subject was done in 1987 and it wasnt conclusive bla bla bla .....But ya high times was bascily saying that its not what people are trying to say it is....Me, i havent made up my mind yet
flowamasta
Well-Known Member
yeah, i'm seeing alot of talk on this subject, ey heres my say, why doent someone use just 1 uvb bulb on 1 side of their plant, and see the difference? um, that seems pretty logical to me, all this talk wont get real far. proper testing needed, i for one dont think my nugs need to be more potent, but i am interested if it makes them look more sparkly and better looking
GreenVet
Well-Known Member
I'm in the process of that right now with one of my plants, UV on the back side no UV on the front. I'll let you know how it goes as buds develope more.
Blunt Master Flex
Active Member
I don't think I could ever see myself saying this.