Window Diffuser

Got a window with no view but in a room that benefits from daylighting?  You try to dress up the window with blinds or curtains, but it still hurts the senses like a sore thumb.  (Metal Venetian blinds can be tilted to not only cover the ugly view but also deflect light deep into the space.)  One option is a colorful window film ~ get one with UV blocking if you also want to eliminate solar heat gain in the summer.

Of course, the most energy-efficient solution is to fill out the window with insulation, seal it airtight, and put a tapestry over the opening.  That being the case, nobody wants to live in a cave.  Natural lighting not only saves on artificial lighting costs but connects you to the natural rhythm of the solar day.  The trick is to have a balance between the window area and daylighting.