The huge inflatable Santas, reindeer, and snowmen adorn many lawns at Christmas.   When the power is turned on at night, they inflate, and glow spectacularly.  Some have moving arms, which wave at those passing by.  However, during the day, they deflate into heaps of dead creatures, more appropriate to Halloween.  It is noble to save energy – but it would be much more pleasing to the eye to leave these on all day too!