The bryn mawr collection is made of cast aluminum. This material is a good choice for exterior lighting since it does not rust and resists corrosion. The classic design of this fixture lends itself to many architectural styles. Complementing its clean design these lanterns features clear beveled glass panes. durable cast aluminum traditional style clear beveled glass panes pre-assembled for easy installation requires 1 100-watt max medium base bulb installation hardware included 1 year warranty The Bryn Mawr collection is made of cast aluminum. This material is a good choice for exterior lighting since it does not rust and resists corrosion. The classic design of this fixture lends itself to many architectural styles. Complementing its clean design these lanterns features clear beveled glass panes. Durable cast aluminum Traditional style Clear beveled glass panes Pre-assembled for easy installation Requires 1 100-watt max medium base bulb Installation hardware included 1 year warranty