Thomas Lighting Sl7413-78 Three-Light Bath Fixture, Brushed Nickel brushed nickel finish, no glass only bulbs (not included) and backplate height from center of outlet box 2 1/8 inches 4 1/4 h x 18 w x 2 1/8 ext 3 light 100w med base bulb required not included Linear vanity lighting fixtures should generally be at least 24 inches wide based on the size of your vanity sink; and the middle of the fixture should be approximately 75 to 82 inches from the floor, or at least 6 to 8 inches from the ceiling. Allow for 3 inches between the top of the mirror and the bottom of the light fixture for optimal lighting. When installing 1 or 2 light vanity sconces in bathroom applications that flank a mirror, allow for about 4 inches of space on either side of the mirror, and the center of the light to be hung roughly 66 inches (or slightly below eye level) above the room's finished floor. The minimum height suggestion of 66 inches is also suitable as a guideline for applications throughout the bathroom or home.