I would avoid the UV masking material that is applied with
          adhesive to the panes. Do you have multi-light windows (with
          smaller mullions [or is it muntons?] in each window? If you
          do, then maybe you could use a treatment that is not at all
          inconspicuous, but flexible and removable. Basically, you
          can get window shades that are like regular domestic
          windowshades, with any degree of uv/light filtering. As I
          say, they don't exactly blend into the woodwork, but they do
          their job, and they can be updated and removed easily.
 
          The UV filtering with adhesive is a real pain: particularly
          with multi-light windows it bubbles and separates. You can
          get UV filtering lexan and glass too, but they are real
          expensive. Actually, if I'm not mistaken (and if I am I'm
          sure someone will correct me) regular glass filters out a
          good portion of the UV, if not all of it (which is why cheap
          sunglasses say that they are UV protectant). You may be more
          worried about light levels and heat in the house, in which
          case, regular shades might be the best approach.
 
          Eric Siegel
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