I believe he has done that experiment over 1 years time, and the results were that there was no noticable difference in the comic that was displayed and the control.
Exactly.
That experiment was done with a CGC'ed book, displayed in a bookcase in a room that gets plenty of indirect light throughout the day. Even after a full year of being subjected to indirect light, there was no discernible fading - the before & after scans were near-identical (and any variances in those were probably due to different lighting conditions as I was scanning the book).
There's no doubt that if the book had been placed in the path of direct sunlight, there would have been noticeable fading, though - perhaps I'll try that next
to be honest, while interesting, that would seem like an extremely limited study. It only covered a single book and science would dictate:
multiple copies
more than a single year
a control
we'd need more data than just that single copy. ok, missed that there was a single control (?), but you'd still want multiple examples, over more than just a year, to draw any real conclusions.