I didn't mean to be critical in a negative sense, just wanted to point out it's useless for practical matters: See, even if we were able to say "we need X millijoules/cm² of UV to expose this process" that wouldn't mean much, because the needed energy would still depend on a myriad number of additional parameters - which may be impossible / impractical or not wanted to reproduce... That's my point.

Regards,
Loris.