thing is if you haven’t invested in crazy amount of time and effort and cash to make a near perfect enviroment and also good genetics and your process and cure is also dialed ( so what if you get your extra terps if you destroy majority by bad process and cure protocol ) uva or b (exp b cause it cna do so much harm ) shouldn’t be on top of your “to-do’s” till you got that dialed. Not only is uvb selected just like high ppfd on actually working without trial of your strains and knowing what they look and end result of using and without and knowing your enviroment limits , just like nutes demands.
if you do know your plants demands and your enviroment is on and so forth, than sure add uva/b and do trials cause exp with uvb it’s so easy to fry and do negative than that small % you gain, my views is it worth it to most hobbyist and rely on their yeilds vs 10000’s of lights for commercial level and trialing in small scale of their room or testing lab after they show their enviroment my view would be heck yes I would def recommend for them .
sure there’s many people that show fire from adding uva or b for extra spectrum and added trich but do many post their failures on modern day social media like that? Call me a negative Nancy but Inless your talking to people that sells these bars almost all the reps for led’s and grow room advisor would say the same like I am Inless they are trying to sell you uva/b “improvements”. Hell timber and hlg both told me when asked about uva and b it wasn’t worth it and it’s a last thing to add if you got everything else dialed in.
it wasn’t intill I invested god knows amounts into a sealed and reconstructed room for growing and highest tech led’s and misc and running them multple rounds and genetic selection that liked higher ppfd and higher nutes intakes I ever was wanting to do even uva add on cause I have seen from friends that are LP when doing trials from small amounts to max amounts get fried or don’t help to show to add to every 4x4.
‘’my conclusion for now is yes uva is fine after everything else and it is a good add on that the lights lack , but I honestly think Inless you are monocropping your crops genetics based on ur room that demand snd such ( thing is I had many hps loving pheno’s or outdoor and than when I switched to leds they became haters and i couldn’t ever get the same quality vs choosing proper genetics ). All your doing is jumping down the rabbit hole or damaging your end result with Uvb Inless your willing to risk and learn the timings of the plants limits , hints why commerical can do it in small scale to them and see if it’s worth it and have less failure or damage done.
my test as of now is (4) of my 4x4’s or 2 4x8’s rows have uva on them, like to test before investing in whole room upgrades and Claiming that was what made my quality