The Ryton patio wall sconce outdoor light uses an LED to reflect down onto a water glass panel of glass. Finished in brown clay complimenting a warmth to the design. This sconce requires Integrated LED, 6 Watt bulb that can be placed on a dimmer. The back plate measures 4.25 x 4.25 inches. UL Rated for outdoor use. Professional installation by an electrician is recommended.