The Aura Pendant light features 19 retro clear glass pendant lights each powered with a G4 10 watt bulb. The outer glass is made of borosilicate glass which is commonly known as Pyrex glass making it tougher and clearer. The inner glass is not the bulb but with the G4 bulbs it makes it look like the bulb and this is made of clear glass. The Aura has 19 round pendant lights and adds a dramatic look for a kitchen, entryway, or office lighting. The G4 bulbs are commonly found at Home Depot or Lowes and are about $5 or $6 for a dozen bulbs making them easy to replace and maintain at a small cost. The ceiling canopy for hanging the pendant light is a small 5.5 x 3.25".