I did read here (and also in another topic I think), that the plants have to get used to UV-B.
Let's say one would maintain the following schedule: Clones 2-3 weeks, veg for 1-2 weeks and flower for 8-10 weeks.
And one would have 3 different rooms: A: Clone, B: veg and C: flower.
Would it then be possible to - once the clones get to the veg room - start with 1 hour of UV-B the first day in the veg room?
Then 2 hours the next day, etc., and then slowly building it up to 12 hours the day before they go the flower room?