The 'Ultra' is a design of Jo Hammerborg for Fog og Mørup. It consists out of 4 rings in copper with an orange inside. The use of material and the color of the inside make the beautiful light when it shines. In the lamp pictured, there is a small piece of matted perspex glass in the lowest ring so one does not look into the lightbulb from any direction, the other light does not have the perspex piece. The other one also has a more darker tan. The copper of both lamps does have some patina to it from ageing over the years.