This large lamp uses a geometric curve called a bi-arc (binary arc) to make the top shape. To make the entire lamp I combined it with a vertically extruded star shape with 15 points, but with the points cut off to make flat ends. This is what forms the vertical part of the lamp. Then I cut holes in the resulting geometry with an array of pipe shapes.

This lamp is designed to hold any one of several LED lights called "puck" lights. You can get these powered by either batteries of wall power. This blog page has links for wall powered lights that work well: http://birkbinnard.com/blog/wall-powered-led-lights/. It printed in a little over 44 hours using a print speed of 80 mm/sec and a layer height of 0.200 mm.