Light switch also seems vague.
http://www.google.com/imgres?imgurl=... t:429,r:7,s:0
http://t3.gstatic.com/images?q=tbn:A...ZNCpHRGzXlZwFe
The latter seems more useful, but seems less "standard." How much can we take the switch apart? If all we need is the mechanism, can we tear away at the innards?