A little plaque to stick above lights/switches etc to remind people to turn things off in your workplace or home.
(Quite why people want to leave things on I dunno)
Print it and then run over the tops of the letters with a contrasting texta/permanent marker. White material then black marker/texta is fairly effective. But if you want subtle - leave as is. Although if I had a dual extruder I'd be using it for this and making the model a bit different - well, I've included the source sketchup file if anyone wants to play around.
Can size as required - original is 60x50mm (widthxheight).
Hopefully you'll save some electricity by reminding people to turn the bloody light off.
Included the "ready to go" file for the Makerbot Replicator 2 at medium default settings.