These new dolls house lights battery lights use a" built-in" "BRIGHT WHITE" LED bulb and a 3 volt battery and although more expensive than the same traditional "wired lights" are quick and easy to install in any position in your dolls house as they require no wiring. They come in a range of styles for dolls house walls, ceilings, floors or tables, with each light having its own individual battery and switch, and because there are no wires can be moved around easily so you can have lamps in any position. The ceiling and wall lights fit to the walls with a magnetic backplate which does stick into place with double sided tape or glue. The LED bulbs operate for up to 50 hours on a single 3 volt lithium battery. To replace the battery simply unscrew the base. If you have any problems then please contact us.