This is interesting: according to Felix Salmon, some of the works in the Dan Flavin retrospective are marked "exhibition copy" and have a different quality of light than those not so labelled. The NGA must discuss what the designation signifies and the broader issues of technology and preservation involved with Flavin's art. Perhaps someone has the word? I'm not likely to see this show at least until November or December or even end up waiting until it's in Chicago. Maybe Tyler's new gig gets him free exhibition catalogs? Or an enterprising soul could take a peek at one at the show? Inquiring minds, etc.
Quick update: This pdf of a few preservation conference abstracts has an account of one that uses Flavin's art as a case study. The four strategies laid out include some of the options mentioned in the LA Times article I linked to the other day and also echo what seems to be happening at the NGA.