Huge Table Lamp

Just purchased this huge lamp. This lamp stands almost 5 ft. tall. The huge shade and ball shaped base is 5 ft. in circumference. It is sitting on my dining room table and is inches from touching my 8 ft. ceiling. It is very heavy. It appears to be made from some kind of ceramic like material. The shade alone is 26 inches tall. I've never seen anything like it. Definitely a conversation piece! The only markings I can find on it is on the sockets. it says " Leviton, Made in the U.S.A." It has two sockets with separate pull strings.