You are wrong. Again.
Every single study ever done on the topic points to the same result: UV light increases potency. No other wavelengths of light do. The plant produces more trichomes to protect itself from damaging radiation.
How many more do you want? It explains all of your outdoor examples perfectly, and accounts for the fact that indoors, more wattage does not equal more potency, as EVERYONE has told you every time you post that particular bit of false information.
One of many challenges that arise from the ongoing debate of the efficacy of UVB light in cannabis horticulture is that there is little, if any, available lab research to support the theory. I have not been able to find one published scientific study
specific to cannabis. Academics are just not pursuing this trial publicly so it seems. If we take the cannabis species out of the discussion and instead focus on trichome development on par with UVB exposure then there is much literature to explore. One will have to do that research and come to their own conclusion as it relates specifically to cannabis.
That said, there is plenty of academic research that supports increased trichome development of many plant species as a result of increased UVB light exposure. Trichomes are not unique to cannabis as many plant species produce trichomes. It’s the Delta-9 group that makes cannabis special to us. So, the academic jury has voted and said “yes”, increased UVB light will increase plant trichome production.
Now we have to break that down to determine if the increased trichome production increases trichome potency. Without sophisticated laboratory equipment to test the Delta-9 group it’s a very subjective guess. I’ll digress a moment and say that all of the seed companies that publish THC levels are either paying money to a lab to definitively test the THC levels or they’re simply guessing or offering subjective opinion. I'm opting for the latter as it is a very expensive laboratory effort to actually test the Delta-9 group.
One thing is absolutely certain. Exposure to high levels of UVA, UVB, or UVC are detrimental to human health and great care should be used when using any source of intense light or UV light in the grow space. One needs to protect the eyes as that is the most sensitive area to be damaged if the UV light is too intense.
Having explored this topic is some previous threads I am of the mind that if the grower will exploit every paramater available to him/her as a grower, exclusive of adding UVB light source, and select genetics that are proven to be high yield, high potentcy plants, then the addition of UVB is probably inconsequential. There are only so many miles-per- gallon that can be obtained, so-to-speak. Adding UVB light in a grow environment that is less than optimized and growing a strain variety of cannabis NOT known for it's potentcy will not significantly increase the final potency outcome. Why bother? Just focus on good genetics and an optimized grow environment. If the yield is high enough then make hash and consolidate all of the available THC in condensed form, smoke it, and be happy with that.
Edited by Possuum38North, 07 July 2010 - 02:20 PM.