The night time challenge

OK, perhaps these are not the easiest of windows to dress, but it would be good if the midnight sunshine was not quite so apparent!

The strange thing is that, in spite of true daylight at midnight, all the streetlights are switched on.  We note (and admire) the Swedish habit of saving energy by only lighting areas when there is immediate need - museum lights only switch on as one enters a particular area, for example, and turn off automatically the minute the room is empty.  And yet, at the same time as UK councils decide to switch off street lighting to save energy, here the lights shine on regardless.

Or perhaps there is a need to somehow communicate the changing days?