I hope you like the slightly cryptic title. I have a caravan and want to fit a PIR in the toilet area so when my wife goes to use it at night the light comes on. There are two LED strip lights with a total load of 7 watts so less than 1 amp at 12volts. I know it is easy to use the switch but as my wife is disabled she tends to use both hands to hold onto things to stop her falling. It would be easy to do with 230 volt gear but as we sometimes caravan in places without access to the mains supply I'd like to fit something that works off the 12 volt battery. Does anyone have any idea how I can do this?