You are like a little genie sitting on my shoulder whispering "listen to the plants!"
I'm going to wait for others to respond, but I tend to agree letting her recover makes sense. I just don't understand how the instructions for these lamps are for 2 hours a day to start. Hmmmmpf
To put it scientifically, the uvb hits the uvr8 and that accumulates something in the nucleus (i just wrote this down a bit back) and my point is, i think that accumulation has reached a sufficient level that we should see the corresponding uptick in the protein the UVB corresponds to the messenger rna for.
My guess is the plant cells attempt to reach an equilibrium w.r.t. that uvr8 accumulation in the nucleus at some acceptable level. Protection from the thc will lower that accumulation and so the plant cell will chill at that level. Accumulates again? Oh crap, more. Up to some local maximum dictated by genetics and the economy of resources.
If you push that too fast you get a weakened cell that just sucks at everything even if it wants the sunscreen.
This is my mental model. I'm also soaring high on haze so sorry if this makes no sense and obviously i know the science is loose w the terms but i can fix w the right terms and i think it still works the same in a basic mechanistic sense.