On Tue, 12 Jul 2011 16:44:42 -0700 (PDT), "
wrote:

Contrary to what some have said, you can put window film
on double pane windows, including skylights. The issue
with possible breakage due to thermal stress only occurs
on very large glass and with darker tinting. Window film is
widely used in residential as well as commercial applications.


True. I have a couple of windows (small) with a static cling film. An
opaque film that reduces the desert heat. It is suggested to check
with the widow manufacturer before install.

Could probably cut down the heat by 60% with only a
minimal reduction in visible light. The other option is
shades which are available for skylights.

Film helps here when temps get above triple digits (up to 117° F).