To install a wall-mounted light you’ll use a ceiling box and wire just as you would for a ceiling light. Most sconces mount with a center stud so you can level the fixture even if the box isn’t level. It should take about three hours to run cable, install a switch, and mount two wall sconces. Before you begin, make sure you know how to strip, splice, and connect wires, install electrical boxes, and run cable through walls and ceilings. Then follow these step-by-step instructions on how to install wall sconces.
To install a light fixture directly onto a mirror: