Watt Stopper’s PW-100D passive infrared (PIR) dimmable wall switch sensor. [podcast]http://www.green-talk.com/podcasts/wattsstopper.mp3[/podcast] It seems like every other day I hear on the news that changing your light bulbs could save the world.  True.   But, how about making it simpler?  Let’s change the mantra to turn off your lights when you leave a room.  You know […]