So I was building some custom sized light strips for places in my house and realized that the double sided tape on the back side wasn't going to be strong enough on its own to hold up the strips. I also decided that having wires and a switch dangling was neither safe or attractive so I designed this small box for the switch.

I used this for a switch that is supplying 12 volts under less then 1amp. This is not a good cover for any 120V AC current switchs.

I've included the sketchup file.

Simple print. walls are 1mm thick and the fill is 50% to give it strength at the screw hole.