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 infamousvideo
Registered: 08/24/08
Posts: 13
Last seen: 16 years, 6 months
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 Growing with Blacklights? 
#121493 - 09/13/08 09:51 AM (17 years, 7 months ago) |
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I have 2 inexperienced buddy's who both grow under black lights and their plants have turned purple does anyone know anything about growing with black lights is their anyone else who has tried this or anyone else that has heard of this?
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 10 years, 12 days
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Re: Growing with Blacklights? [Re: infamousvideo]
#121494 - 09/13/08 10:09 AM (17 years, 7 months ago) |
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I know that black lights aren't going to provide enough of the right kind of light that the plants need. The plants turning purple because of the black lights sounds pretty implausible to me.... why did your two buddies think that it would make sense to even try using black lights? 
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fear.loathingSF
One toke over the line
Registered: 04/20/08
Posts: 171
Last seen: 15 years, 11 months
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Re: Growing with Blacklights? [Re: Sirius]
#121495 - 09/13/08 10:11 AM (17 years, 7 months ago) |
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Photosynthesis works by absorbing several specific wavelengths of light. Blacklights do not provide these wavelengths. Are you sure tha plant does not just look purple under the blacklight?
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infamousvideo
Registered: 08/24/08
Posts: 13
Last seen: 16 years, 6 months
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uhm well i think it might just be a purple strain but I'm not too sure they don't only use black lights they use sunlight from their windows too but its their first time ever growing and i was just curious about the black lights
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Chapter 4
Registered: 08/27/08
Posts: 152
Last seen: 14 years, 3 months
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Re: Growing with Blacklights? [Re: infamousvideo]
#121537 - 09/13/08 11:56 AM (17 years, 7 months ago) |
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the 2 kinds of black lights make UVA light, one type creats a "little" blue light, but not much....and it uses filtered glass.
UV damages plant cells. whether or not uv causes the plant to create trichomes, i am not sure....
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 Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal 
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Re: Growing with Blacklights? [Re: Chapter 4]
#121546 - 09/13/08 12:20 PM (17 years, 7 months ago) |
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actually I've read that UV wavelengths are extremely important in THC production within the tricromes. It acts as a catalyst as the sub-components of thc cross the disc cell barrier.
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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Oh, I should add though, unless the plants are in late flowering, the blacklights will do jackshit
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Chapter 4
Registered: 08/27/08
Posts: 152
Last seen: 14 years, 3 months
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which is why i say they may help thc, but they dont help plant growth!
this is probably why many plants have anthocyanin, to protect against UV stress on the cells.
form my understanding, UV doesn't really do jack shit, it stresses the cells and causes certain pigments to be there to avoid stress (among other things like too much light).
in a way it may be good for bud, cause it *may* increase tch production which may be a secondary defense against harmful radiation....but as far as a growing plant, it just wastes a plants energy while growing.
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 10 years, 12 days
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Re: Growing with Blacklights? [Re: Chapter 4]
#121592 - 09/13/08 02:05 PM (17 years, 7 months ago) |
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UVB is the spectrum of light that promotes development of THC, although UVA might to a much smaller degree. Either way, a black light just isn't going to do anything for the plants but generate heat, really.
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coda
Registered: 04/20/08
Posts: 4,736
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Re: Growing with Blacklights? [Re: Sirius]
#121763 - 09/14/08 12:17 AM (17 years, 7 months ago) |
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UVA doesn't do jack for cannabis cultivation, like you said UVB is the wavelength you want. I'm surprised your friends plants are still alive after only getting filtered sunlight and black light.
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MFDoom666: sobriety kills my buzz every time.
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Linux
Recovering Addict/Alcoholic
Registered: 08/22/08
Posts: 90
Loc: Detroit Weed City
Last seen: 14 years, 11 months
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Re: Growing with Blacklights? [Re: coda]
#121954 - 09/14/08 12:31 PM (17 years, 7 months ago) |
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LEX LUTHOR! Truly the incarnation of evil!
He doesn't wash his hands and he steals forty cakes, which is as many as four tens.
And that's terrible.
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Chapter 4
Registered: 08/27/08
Posts: 152
Last seen: 14 years, 3 months
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Re: Growing with Blacklights? [Re: Linux]
#122396 - 09/14/08 11:46 PM (17 years, 7 months ago) |
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you can do better for less money at your local lighting store  and *if* the UVB does help thc, you only need it in flower.
has this UVB theory being proven yet?
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Harry_Ba11sach
cannoisseur
Registered: 04/20/08
Posts: 11,753
Loc: Nepal
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Re: Growing with Blacklights? [Re: Chapter 4]
#122560 - 09/15/08 11:19 AM (17 years, 7 months ago) |
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there's no such thing as "proving" a theory, but there is a ton of empirical evidence suggesting that UVB light is an extremely important catalyst for THC production, but certainly not necessary (and generally detrimental) to tissue growth
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coda
Registered: 04/20/08
Posts: 4,736
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Re: Growing with Blacklights? [Re: Linux]
#122582 - 09/15/08 11:51 AM (17 years, 7 months ago) |
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that uvb light would work just fine, you can also visit your local petshop and pick one up if you don't want to order online.
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MFDoom666: sobriety kills my buzz every time.
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Chapter 4
Registered: 08/27/08
Posts: 152
Last seen: 14 years, 3 months
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Re: Growing with Blacklights? [Re: coda]
#122590 - 09/15/08 12:33 PM (17 years, 7 months ago) |
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granted it has been a few years since i bred any reptiles, but when i was into it the tubes (various brands such as zoomed) were teh best UVB bulbs around (for animals).
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Linux
Recovering Addict/Alcoholic
Registered: 08/22/08
Posts: 90
Loc: Detroit Weed City
Last seen: 14 years, 11 months
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Re: Growing with Blacklights? [Re: Chapter 4]
#122594 - 09/15/08 12:52 PM (17 years, 7 months ago) |
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Links?
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LEX LUTHOR! Truly the incarnation of evil!
He doesn't wash his hands and he steals forty cakes, which is as many as four tens.
And that's terrible.
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 10 years, 12 days
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Harry_Ba11sach said:
there's no such thing as "proving" a theory, but there is a ton of empirical evidence suggesting that UVB light is an extremely important catalyst for THC production, but certainly not necessary (and generally detrimental) to tissue growth
One thing to consider, too, is that cannabis is either mostly a equatorial plant, or a plant of higher altitudes, thereby being exposed to more UVB. 
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lukeduke711
Registered: 07/06/08
Posts: 123
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Re: Growing with Blacklights? [Re: infamousvideo]
#122771 - 09/15/08 10:44 PM (17 years, 7 months ago) |
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dumbest thing i ever heard
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Chapter 4
Registered: 08/27/08
Posts: 152
Last seen: 14 years, 3 months
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Re: Growing with Blacklights? [Re: Linux]
#122855 - 09/16/08 12:49 AM (17 years, 7 months ago) |
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Linux said:
Links?
http://zoomed.com/cm/Home.html
look at other brands as well, aquarium lighting have some good tubes as well, just look at the charts on the manufacturers websites.
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Sirius
Saturn Ascends
Registered: 04/20/08
Posts: 1,540
Loc: The Milky Way
Last seen: 10 years, 12 days
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Re: Growing with Blacklights? [Re: lukeduke711]
#122907 - 09/16/08 05:44 AM (17 years, 7 months ago) |
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lukeduke711 said:
dumbest thing i ever heard
The cultivation forums are intended for productive discussion. Comments like this add nothing to the thread and shouldn't be posted. If you feel the need to express this point of view, utilize the private messages feature.
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