uva light to enhance tricomb production

[starramus]

Greenleaf The article appeared not as a book, but as an article in the journal Photochemistry and Photobiology Volume 46 #2 pp. 201-206 written not by a Lyndon, but John Lydon. Here is a quick link to the pdf file. https://pdfs.semanticscholar.org/1286/274e9e6a286e8989e7825557ff49ce481759.pdf Ain't Google wunnerful? Read on.

 

[starramus]

Quantifiable results were shown in Lydon's experimentation.

 

[starramus]

To duplicate his experiment Westinghouse FS40 Sun Lamps are required and the associated filters.

 

[starramus]

Title of this thread should be corrected to: UV B light to enhance trichome production.

 

[Farmall]

Primo.... excellent observation...excellent!

 

[Farmall]

I had a discussion with Solacure and recommended 2 hours total and if increased, no more than 15 min a day. He also said NOT to go into the room when the bulb is on and that the reflectors are built into the back of the bulb..., you can see the difference when it’s off

 

[Rwise]

And to expand on what Toker1 said, UVC is deadly to all plant life, it is used to sterilize many things it kills mold etc. So you dont want UVC in your grow room!

 

[Greenleaf]

starramus Thank you for the correct link, I'm an idiot sometimes lol.

 

[Greenleaf]

starramus Like I said, I'm an idiot, I actually meant to write UVB.

 

[Farmall]

I’d blame it on autocorrect..!

 

[starramus]

Greenleaf posted "Like I said, I'm an idiot, I actually meant to write UVB."

Actually thank you for posting this thread. I must confess to being ignorant on this aspect of growing, and have become edjumicated on the subject. Thanks to Toker1 for his input, and of course DrPhoton for his invaluable reference to John Lydon's research. Most enlightening demonstrating that their is appreciable benefit from irradiating with UV B.

 

[abdulwahabmalik]

For Your information, I have not used UV whichever its flavor, nor am I Doctor Photon, but I would think it best to emulate the spectrum of natural sunlight as it falls upon the earth. The cannabis plant has evolved through natural selection and fine-tuned itself to this natural light source. Below is a chart showing which UV rays actually penetrate the ozone layer, and which do not. Therefore I would say that UV A would be beneficial to resin production whereas B and C might be detrimental. Maybe DrPhoton can clarify this for us.


Ultraviolet A UVA 315–400 3.10–3.94
(0.497–0.631) Long-wave, blacklight, not absorbed by the ozone layer
Ultraviolet B UVB 280–315 3.94–4.43
(0.631–0.710) Medium-wave, mostly absorbed by the ozone layer
Ultraviolet C UVC 100–280 4.43–12.4
(0.710–1.987) Short-wave, germicidal, completely absorbed by the ozone layer and atmosphere