This lamp uses the same basic design as my other crenelated pieces, but this one has rounded corners rather that straight-edged ones. It also has no twists, so it avoids the slicing problems caused by overlapping shells.
This part printed in 15 3/4 hours using a print speed of 80 mm/sec and a layer height of 0.200 mm.
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/