I've been doing a lot of work with a leading green energy company of late, so I've become very conscious of switching off lights and other power wasters.
Which is probably why I love the push button in this picture so much.
It's from the front window of the Howies store in London.
They're doing their bit to conserve energy and at the same time offering customers and passers by the chance to do a bit of evening window shopping.
What a bright idea.
Thanx to NP for the pic