Okay, I understand that UVB lighting is responsible for THC production and want to give it a try. I am doing some reading and from what I understand only UVB values of 610 - 720 nm during flowering are optimal. Whereas 280 - 315 nm would is harmful and causes plants colors to fade or even worse at 200 - 280 nm to become toxic and die. Or increased to 1000+ nm where there is no absorbtion by chlorophyll, then flowering and germination stops. My question is, how do I convert this 610-720nm range into UVB lighting that I can buy at the store? For instance I see UVB lighting rated as 7%. How do I convert that 7% to nanometers (nm)??
As someone else will probably say, uvb isn't the only reason for thc production but will improve it. I am also wondering what is the best % to buy, some one said they had a 10% bulb on their plants and they budded nicely so I guess its not toxic. I just ordered a 5% myself
Just had an idea... what do you guys think about using LED's to get the desired UV amount? I'm trying to find some in the nm range you posted. If you guys find any lights that you know are perfect, please post them!
I saw this but wasn't sure. http://cgi.ebay.com/Plant-Booster-I...ryZ42225QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
Damn that light is cool!! I am gonna hold off until I can confirm this target nm range. Here is an interesting article by Ed Rosenthal regarding UV light. As far as LED grow lights are concerned I found this site. Below is a scale of nm effects on marijuana specifically. I have seen this exact scale probably 15 times on various sites, so I do not know who to credit for the info. Here it is anyways <TABLE cellSpacing=0 cellPadding=3 width=620 align=center border=1><TBODY><TR><TD vAlign=top width=95 bgColor=#ffffcc>200 - 280 nm</TD><TD width=506>UVC ultraviolet range which is extremely harmful to plants because it is highly toxic.</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>280 - 315 nm</TD><TD width=506>Includes harmful UVB ultraviolet light which causes plants colors to fade.</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>315 - 380 nm</TD><TD width=506>Range of UVA ultraviolet light which is neither harmful nor beneficial to plant growth.</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>380 - 400 nm</TD><TD width=506>Start of visible light spectrum. Process of chlorophyll absorption begins. UV protected plastics ideally block out any light below this range.</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>400 - 520 nm</TD><TD width=506>This range includes violet, blue, and green bands. Peak absorption by chlorophyll occurs, and a strong influence on photosynthesis. (promotes vegetative growth)</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>520 - 610 nm</TD><TD width=506>This range includes the green, yellow, and orange bands and has less absorption by pigments.</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>610 - 720 nm</TD><TD width=506>This is the red band. Large amount of absorption by chlorophyll occurs, and most significant influence on photosynthesis. (promotes flowering and budding)</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>720 - 1000 nm</TD><TD width=506>There is little absorption by chlorophyll here. Flowering and germination is influenced. At the high end of the band is infrared, which is heat.</TD></TR><TR><TD vAlign=top width=95 bgColor=#ffffcc>1000+ nm</TD><TD></TD></TR></TBODY></TABLE>
