UV light how to use

with UV fluorescent tubes, the thing is each time you turn on and off, you lose a little bit of the coating inside the bulb, reducing strength slightly with each on/off. the most effective UV cycles involve short sharp doses 2 on 2 off etc but this rips through bulbs. Maybe get 2 effective grows before it's time to be used as a secondary light in 2nd tent. This can get a little expensive for my taste. There is no business going to apply something that reduces overall yield when the entire industry is based on "weight" as a metric for "price" especially when it has a high overhead and cost to maintain. Technological advancement in UV is roaring and new tech has just been developed the first led's below 365nm have just been released this year, they are still very very expensive though given a year or 2 once prices get hammered down. Until that time no government-run dispensary that mass produces your time=money weed. 280nm you need 2-6 hours per day depending on what you are going for, the damage will start to be noticed as you go higher, adding excess blue wavelengths have been shown to help repair this DNA damage done by UV. At 6 hours you will be sacrificing a little yield for higher concentrations of trichomes, it would take your own experience to find what's right for you.

All that depends of the temperature, if when you turn ON UV Light + LED, you get an average temperature less than 25°, its OK you can use it with your main light. But if when you turn on all your lights, you get a big warm environment like 26-27°, i advise you to not use it together, because you will burn your plants, and all the good terpenes will go away for ever. In your setup, it seems OK to use it together imo. In my case, i know i have to use it separately. Have a good grow. 420

Also to note, stress response at 280nm is 10x that of response at 290nm, do not be fooled into buying Migros or any other lamp that does 310nm or any other wavelength, the scientific literature doesn't lie, big businesses looking to make a sell tell lies for profit. UVC cannot pass glass or plastic, there is only 1 type of fluorescent lamp on the market that was used for curing at 280nm prior to it being used for horticulture and that was Solacure, used to tan pig hides and violin, patented quartz glass is the only glass which UV at 280nm can pass through, this is why you can't have plastic or glass on anything that is UVC as it simply can't pass through glass or plastic, same reason greenhouses don't get any UVB and only fragments of UVA. This patent which existed long before the literature pointed to huge stress responses is what prevents the markets from being flooded, everything else is just a pretender.

UV UV UV, alone means nothing the wavelengths it uses are 365nm and 395nm which may as well be the cheapo lights off Amazon, 380nm, and above is "blacklights" used for cheap parties, etc, and used across all of the flowering can boost terpene and flavinoid production but the differences will be nominal. 365 is the wavelength used to cure plastics/resins and will have a better effect on terpenes but again will do very very little in terms of stress response. The photoreceptor used by UV to elicit the stress response you seek is called "UVR8" or "Universal locus resistance 8". 95% of which is triggered and only triggered at a peak 280nm, new studies suggest there is also a synergistic stress response between 285nm and 385nm when using both these wavelengths in conjunction it further increases all flavinoid, terpene profiles. I have personally tripled linalool content on a GDP strain using the method. Have your light come on with your main and don't even think twice about it. Your next step will be to acquire a 280nm if you want. be warned that shit doesn't mess around though it will fry you, 10-20x stronger than a tanning bed. any further information you require on UV you can ask or check out my grow on UV. much love bro! Using this method THC can be increased anywhere from 5-30%+

I think it should always be on in conjunction with your normal light. UV helps with the creation of cannabinoids in your plant so it's useful in the flowering/bloom phase

Only benefits during flowering, between week 2 and 6. Have it on at the same time as your normal LED light, not on its own.

bugbee has a video on this.. if i recall correclty, you want it in bloom phase and doesn't help much in vege phase (or with an auto,once it flowers.. same thing). it may have other benefits beyond potency or whatever it is statistically correlated with. It may help prevent infections? it should be antibacterial in nature. think that uvb is more effective with that, though. (uvb you apply 10-15 minutes after lights go out or befoe they come on.. the spores defend themselves in light more effectively - google 'vineyard uvb powdery mildew' and it'll explain why better.) the point is this stuff has nuance... adding more is not always best. In this case i'm 90% sureit's only benefit is in flower phase.. no idea on levels you need. and, that's not something tha twill be highly resolved with a few plants in a home garden, so be hesitant about any anecdoatal based recommendations.