This is a lamp I turned A. few years back, It was necessary to build some tooling and hardware, Each of the (four) spirals has a whole bored through the middle. The lamps were turned from a green log of Cyprus, treated with P.E.G.. The one, two, three spiral lamps were created the same, Take a good look at the base, and top view, The cutaway view shows the bored hole with the electric This was a three-year project, a labor of love. I also did it in ceramics. I did hope to put it in production , but was unable to come up with the funds. Have a Wood day, Dan