We have several museum houses and we want to install UV blinds (drastic improvement on that horrible film that bubbled on your windows) and I have a choice of two. The first is quite discreet, lets in a reasonable amount of light but has a factor 2 rating. (That is provides double the protection you get with no blind). The second gives a silver appearance on the windows (outside looking in), makes the rooms dark but has a protection factor of 10. Even if I choose the first I may have to introduce artificial lighting in the rooms but if I choose the second I will have no choice which opens another can of worms. Suggestions, especially from those who have this kind of blind in a house museum? Jennifer Nuske CURATOR Port Arthur Historic Site, Port Arthur, Australia [log in to unmask]