So of course we did this tonight.
A little pointless given all we ever have on at this time of night is 2 60W bulbs, but ya know - we did what we should have.
While all these things are great - ultimately its what you do in your day to day life that makes a big difference.
I am a massive one for the old "reuse, reduce, recycle". It ties in with the classic engineers phrase eliminate, isolate, minimise - but dont tell the greenies that.....