The film works by overwhelming the light passing THROUGH it
with the light bouncing off it. It works when the outside is brighter
than the inside. You could floodlight the outside of the house,
but I recommend using a medieval technology called "drapes".
Whatever you do will make your house darker and reduce visibility.
Insulated Curtains or cellular shades can easily Double the insulation
value of Dual pane Argon Low E Glass.
3.2 R for cellular shades. Figure shades as a compromise and save
year around in energy costs.
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