Terracina Two-Light Vanity Lamp - Polished Chrome with Opal Glass

The Terracina vanity light combines transitional elements with a contemporary polished chrome metal finish. Frosted opal glass shades allow for radiant yet softened light. Ideal for bathroom vanity lights or bathroom wall lights, the Terracina wall sconce brings a modern touch to any bathroom space. May be mounted bulb up or down. Quality metal construction with a polished chrome finish and white frosted glass shades; 1-year manufacturer warranty with US based customer service; UL listed Measures 14 inches wide by 8 inches high; extends 7 inches from wall Wall mounted, easy installation; 4.5 inch backplate with universal mounting plate compatible with most 4 inch and 2 x 4 inch junction boxes Uses two E26-base bulbs, 100W max (not included), fully dimmable when used with a dimmable bulb and compatible dimmer switch Must be hardwired, installation by a licensed electrician recommended What are the dimension for the rectangle back plate that go over the wires?the back plate measures 8