48 hours later I've removed the IIci case from it's little UV box and I'm shocked that it's actually working. It's
painfully slow, but it's working!
The front bezel, which is the section being blasted with UV-A, is much closer in colour to the underside of the case. When compared to the right hand side you can see how much lighter it is compared to the brown mess it once was, and the old Apple Computer sticker that had at one point a very pronounced outline is slowly fading away. Since I'm working on a Macintosh Classic restoration I'm in no rush to retrobrite the IIci so I'm more than happy to leave it a few more days (in total). Once I'm happy with the front, I can then move onto the sides. Maybe point one light either side? Not sure how I'm going to do that.