No ones arguing Hammer just pointing out the facts.
My point on UV-B was in regards to adding extra to a grow space.
The research you posted with them adding UV-C to a grow.
Both are in my opinion hazards firstly to growers and to the plants.
If the idea of lighting is to mimic natural day light then adding unnatural amounts of any UV is no longer natural is it.
Keep up.. With LED your prob gonna add more UV-B. No one adds UV-B when using HID bulbs, They all have UV-A/B. I like to read articles that show results good or bad like the one I posted.
I use supplemental UV indoors as there is none in my HID lights and the difference is quite a lot. They come on mid light cycle for an hour only until the last 3-4 weeks where they have 2 hours mid cycle. I use what’s called a migro UV310. Osram do a good UV tube too. Mine is 25% UVA and 75% UVB. I do not tend to the plants when these are on as it’s about 9 times the UV from natural sunlight. I’m growing the same clones and like to extract oil. The yield since using UV has increased about 30% and the potency is notably stronger too. There is no detrimental effect on yield or plant health.
What kind of HID bulbs are you using that you would need to add more UV-B? If there's no UV-B than yes you should add some, the question is how much. You should prob read the article I posted. UV is not good. Finding the right balance between enough or too much is the question.