Glass that doesn't block UV Light
- Thread starter kappainf
- Start date
Yeah, hps bulbs dont really produce any significant UV. I'm getting a growzilla dual bulb reflector and I will be using a 400 halide and a 600 HPS, this is what i want to put the uv penetrating glass in. This reflector is going in a 38" x 22" x 78" cab, should be sick.
http://www.unitedsilica.com/new/technical-data/index.html#optical here are the optical propertys of quartz. United Silica also fabricates large peices of quartz plate glass.. Large peices of quartz and boronsilicate glass are very easy to find and extreamly expensive.
ElectricPineapple
Well-Known Member
trichs and resin are the same. sorry to tell ya. and resin is actually not a correct term for trichs. resin is the after effect when the trichomes reach their boiling point and melt i.e. lighting the bud.
stumps
Well-Known Member
sorry I was wrong in my whole line of thought. Resin and thc productoin is not the same. you can produce more resin with uv but may not increse the tch. This is one article on it. http://www.greenmanspage.com/guides/thc.html Not the one I wanted. Again sorry for the misunderstanding.
too xntrik
Member
we need Fused quartz glass. Fused Quartz glass lets in uvb to 250nm at about 50% transmission while ordinary window glass blocks 90% of all uvb light... Super expensive and limited to hospital use...treating psoriasis and other, and also the "high quality" little glass plates that you would use under a microscope. Then we wouldn't have to fool with reptile lights and the such!! The problem is after you put the glass in the reflector you cant limit its use or the exposure to the UVB. as many on this site know too much uvb on your plant will jack it up!! In most organisms it destroys DNA after too much exposure, that is why it is used in the food sanitization industry and also in HVAC system on large buildings....think VEGAS. Lots of the casinos use them. I think for now reptile bulbs on a different timing sequence will have to suffice....
I understand the theory that too much UV can be harmful to plants, but just think about how much UV plants are exposed to in the south around the equator. Stand out in the sun for fifteen mins near the equator and you will fry, why doesnt that hurt plants, but UV lights supposedly do?
ElectricPineapple
Well-Known Member
well if you are saying glass in cooled hoods block UV, then i would have killed all mine. no glass in my hood. sorry guys. that glass round the bulb blocks most of the UVB
The glass on the bulb doesnt block UV, I don't know why, it just doesn't. Certain bulbs have warnings unless they have UV blocking coatings.
Also, I'm guessing that you are using hps bulbs which don't emit much UV. Anyways, read the thread u might learn something. Additionally, if you are implying that UV kills plants, then outdoor plants would all be dead.
ElectricPineapple
Well-Known Member
i have man. ive kept along with it. i have a MH. used it for most of my veg. no glass on my hood still. had it 18" from my canopy for about 4 weeks. they are still alive and kicking. ha, the concentration in UV wont but UVB will. "additionally" there is not enough UVB coming from the sun because our atmosphere blocks the majority of it. whereas in your room you have no atmosphere to catch it. learn some middle school science first then you will know what im talking about. also the glass on the bulb does. unless its quartz, as you said, all galss blocks UVB. it is the silica they use in glass, which btw is sand silica and some quartzite, blocks some of the UVB. MH emits more because the Metal Halide produces more UVB, thus the glass is blocking a percentage of the UVB, not an amount. learn some science, then some physics then come talk to me.
also i am using an HPS cause im in FLOWERING, didnt know if you knew but that is the bulb you use for FLOWERING
also i am using an HPS cause im in FLOWERING, didnt know if you knew but that is the bulb you use for FLOWERING
You don't know what you are talking about, there is UVB outdoors.
UVB light can cause direct DNA damage. The radiation excites DNA molecules in skin cells, causing aberrant covalent bonds to form between adjacent cytosine bases, producing a dimer. When DNA polymerase comes along to replicate this strand of DNA, it reads the dimer as "AA" and not the original "CC". This causes the DNA replication mechanism to add a "TT" on the growing strand. This is a mutation, which can result in cancerous growths and is known as a "classical C-T mutation". The mutations that are caused by the direct DNA damage carry a UV signature mutation that is commonly seen in skin cancers. The mutagenicity of UV radiation can be easily observed in bacteria cultures. This cancer connection is one reason for concern about ozone depletion and the ozone hole. UVB causes some damage to collagen but at a very much slower rate than UVA.[citation needed]
As a defense against UV radiation, the amount of the brown pigment melanin in the skin increases when exposed to moderate (depending on skin type) levels of radiation; this is commonly known as a sun tan. The purpose of melanin is to absorb UV radiation and dissipate the energy as harmless heat, blocking the UV from damaging skin tissue. UVA gives a quick tan that lasts for days by oxidizing melanin that was already present and triggers the release of the melanin from melanocytes. UVB yields a tan that takes roughly 2 days to develop because it stimulates the body to produce more melanin.[citation needed] The photochemical properties of melanin make it an excellent photoprotectant. Older and more widespread sunscreen chemicals can not dissipate the energy of the excited state as efficiently as melanin and therefore the penetration of these sunscreen ingredients into the lower layers of the skin may increase the amount of free radicals and reactive oxygen species (ROS).[18] In recent years, improved filtering substances have come into use in commercial sunscreen lotions that don't significantly degrade or lose their capacity to protect the skin as the exposure time increases (photostable substances).[19]
Sunscreen prevents the direct DNA damage that causes sunburn. Most of these products contain an SPF rating to show how well they block UVB rays. The SPF rating, however, offers no data about UVA protection. In the US, the Food and Drug Administration is considering adding a star rating system to show UVA protection. A similar system is already used in some European countries.[citation needed]
Some sunscreen lotions now include compounds such as titanium dioxide, which helps protect against UVA rays. Other UVA blocking compounds found in sunscreen include zinc oxide and avobenzone. Cantaloupe extract, rich in the compound superoxide dismutase (SOD), can be bound with gliadin to form glisodin, an orally effective protectant against UVB radiation. There are also naturally occurring compounds found in rainforest plants that have been known to protect the skin from UV radiation damage, such as the fern Phlebodium aureum.
Bottom line, UVB is present outside. Glad you made it through middle school, good luck with high school.
UVB light can cause direct DNA damage. The radiation excites DNA molecules in skin cells, causing aberrant covalent bonds to form between adjacent cytosine bases, producing a dimer. When DNA polymerase comes along to replicate this strand of DNA, it reads the dimer as "AA" and not the original "CC". This causes the DNA replication mechanism to add a "TT" on the growing strand. This is a mutation, which can result in cancerous growths and is known as a "classical C-T mutation". The mutations that are caused by the direct DNA damage carry a UV signature mutation that is commonly seen in skin cancers. The mutagenicity of UV radiation can be easily observed in bacteria cultures. This cancer connection is one reason for concern about ozone depletion and the ozone hole. UVB causes some damage to collagen but at a very much slower rate than UVA.[citation needed]
As a defense against UV radiation, the amount of the brown pigment melanin in the skin increases when exposed to moderate (depending on skin type) levels of radiation; this is commonly known as a sun tan. The purpose of melanin is to absorb UV radiation and dissipate the energy as harmless heat, blocking the UV from damaging skin tissue. UVA gives a quick tan that lasts for days by oxidizing melanin that was already present and triggers the release of the melanin from melanocytes. UVB yields a tan that takes roughly 2 days to develop because it stimulates the body to produce more melanin.[citation needed] The photochemical properties of melanin make it an excellent photoprotectant. Older and more widespread sunscreen chemicals can not dissipate the energy of the excited state as efficiently as melanin and therefore the penetration of these sunscreen ingredients into the lower layers of the skin may increase the amount of free radicals and reactive oxygen species (ROS).[18] In recent years, improved filtering substances have come into use in commercial sunscreen lotions that don't significantly degrade or lose their capacity to protect the skin as the exposure time increases (photostable substances).[19]
Sunscreen prevents the direct DNA damage that causes sunburn. Most of these products contain an SPF rating to show how well they block UVB rays. The SPF rating, however, offers no data about UVA protection. In the US, the Food and Drug Administration is considering adding a star rating system to show UVA protection. A similar system is already used in some European countries.[citation needed]
Some sunscreen lotions now include compounds such as titanium dioxide, which helps protect against UVA rays. Other UVA blocking compounds found in sunscreen include zinc oxide and avobenzone. Cantaloupe extract, rich in the compound superoxide dismutase (SOD), can be bound with gliadin to form glisodin, an orally effective protectant against UVB radiation. There are also naturally occurring compounds found in rainforest plants that have been known to protect the skin from UV radiation damage, such as the fern Phlebodium aureum.
Bottom line, UVB is present outside. Glad you made it through middle school, good luck with high school.
ElectricPineapple
Well-Known Member
wow i can copy and paste on wiki. i did not there is none. i said that the atmosphere filters a lot of it out. im done with this thread, btw im working on my masters in science, in College. what do you have, a GED?
im done with this thread and your nonsense. just get glass.
im done with this thread and your nonsense. just get glass.
Masters in science, haha. You should have learned how to write by now if that's the case. Glad to see you leave, you weren't adding anything beneficial to the thread anyway. Anyways, I contacted one of the companies listed in a previous link and they said the price for one piece of UV glass would be extremely expensive. Oh well, I guess adding fluorescent UV lighting will be the most practical solution.
ElectricPineapple
Well-Known Member
again science, not english.
too xntrik
Member
Dude....i almost sprayed soda outta my nose when I read my post I was like what is he talkin bout...then I reread what I typed...and laughed my ass off...I guess the sativa bubble I was smokin was stronger then I thought.LOL. Of course lights in a reflector with no glass wont kill ur bud...
ElectricPineapple
Well-Known Member
haha i know. but he think that you lose a bunch of UVB through that glass. you may lose some, but you can have it closer. You lose a lot of UVB through dissipation in the air. the farther away it is, the less UVB getting to the plants.