Where to hang them? With no wiring, anywhere you like. Crafted Tiffany-style from pieces of art glass, sconces run on batteries and install in moments. Nine white long LEDs provide up to 180 hrs.of light on 3 D batteries (not included). A remote controls the on/off switch, dimmer, and timer settings; each sconce also has an on/off pushbutton. Approximately 12" wide x 8" high. Use indoors or out in a sheltered area.