Hypothesis: THC is known to be partially a means of coping with UV light. (Will Incl. Citations if given the room)THEREFORE It stands to reason, UV= THC

Trichomes are a way of dealing with heat, not UV blocking. Trichomes are thought to break up sunlight via refraction, thereby protecting the unfertilized embryonic seed from over heating and dying/drying out. The older and more fragile the unfertilized embryonic seed, the more trichomes and the size of trichomes serve to refract the light and keep the embryo (marginally) cooler and hopefully to remain viable while waiting for pollination. UV on its own is not entirely responsible for trichome composition, it is part of sun light and the combination of UV and visible light is what makes the plant flourish, and a flourishing plant is better able to produce healthy and complete cannabinoids in its' trichomes. This is why myself (35+ years) and most other 20+ year smokers will always prefer outdoor cannabis to indoor cannabis. There is no electric light that can replicate sun light, and cannabis grown in sunlight has the "complete package" of light spectra to produce superior cannabinoids to any indoor cannabis. THC percentage is a genetically controlled and fixed characteristic, a plant can not produce "extra" THC, above and beyond its genetic ability, solely due to lighting. Good lighting only allows a plant to be healthy and have a prime functioning metabolism, which then allows that plant to display its cannabinoid quality and quantity to its best potential. In other words, healthy plant = healthy cannabinoids. By adding supplemental lighting such as UVB (which is the beneficial UV, UVA does largely nothing), you are only providing a "health booster shot" which may allow the plant to more easily display its full genetic potential. Again, in other words, more UV light does not equal more THC per se, but it will allow the plant to produce healthier cannabinoids, which may seem like more THC, but in reality is only what the plant was genetically capable of and limited to/by that genetic ability/potential of that plant. From my research into this matter, supplemental UVB lighting is only beneficial during mid flowering, and should be limited to 2-3 hours in the middle of the "lights on" period, beginning from the 3rd or 4th week of flowering and continued up until to about 2 weeks before the expected harvest date - i.e. stopped 2 weeks before absolute maturity. This seems to be because unlike "natural" UV in sunlight, "artificial" UV produced by electric bulbs is more "potent" or concentrated, and this is also the reason for the limited time of application and the early ceasation of the supplemental UVB, as too much UVB will actually degrade the cannabinoids once they are over mature/ripe at the time of heading into harvest. Therefore, supplemental UVB is really only beneficial for a short period, approximately 3-5 weeks, during mid flowering and for a limited exposure time. Starting too early has no benefit apparently and extended exposure can be detrimental apparently. So, using supplemental UVB is best thought of as a "trichome enhancer" and is not something that will turn average plants into super resinous, THC dripping wonder dope. This information is out there for anyone to find by googling, you just have to sort through the urban myths/ghetto science and find the gold. Oh, by the way, if you do add UVB lights to your grow space, make sure to turn them off before entering your grow space, it only requires surprisingly brief exposure to concentrated electric UVB to potentially damage your skin cells permanently, possibly leading to skin cancers or other skin problems. Hope this helps and good growing! Cheers, Organoman.

Bruce Bugby is insane!! I bought the apogee Par meter when I saw him demonstrating that converting LUX can work but after a while your calculations are off and there’s a 20-30 percent margin of error.

That's the idea. I'm interested in this topic too. I will include UVB light in my current diary if you want to see how plants respond to that. I have some scientist essays (I can send it you by mail if you want) but I'm still researching. A good mate here recommended me also youtube channel and researches of his owner. @Braveheartgenetics : "Check out Bruce Bugbee of Apogee Instruments on you tube. He is a professor from Utah state University that has done a lot of research on this matter...Lots of videos about light on his page".

The link is to a peer reviewed paper titled; Possible role of ultraviolet radiation in evolution of Cannabis chemotypes