Crafted from steel and plated in an antiqued metallic finish. 13" Light uses a 20-watt max, E17 bulb (not included). We recommend an energy-saving LED bulb. 13" Light's backplate measures 5.75" w x .75" d x .75" h 24" Light uses two 20-watt max, E17 bulbs (not included). We recommend energy-saving LED bulbs. 24" Light's backplate measures 5.75" l x .75" w x .75" h. Hardwired; professional installation recommended. Mounting hardware included. Safety tested for use indoors and in dry locations that are not directly exposed to excessive moisture and water.