The concept for this lamp occurred to me when I saw a photo of a large geode. That reminded me of the Devil's Postpile national monument, which, like the geode, has a number of hexagonal structures arranged in a somewhat random manner. I thought this might make an interesting design for an LED lamp, and this design is the result.

The basic shape of this lamp is the top of a sphere, to which I added a number of randomly place hollow light pipes. The pipes are hollow to let the light in and out their tops, and they have 7 sides because this type of structure would never occur in nature.

This lamp printed in a little more than 31 hours using a print speed of 90 mm/sec and a layer height of 0.200 mm. I used no internal supports, but to help with printing the top area of the sphere I did specify variable layer heights. For people who do not wish to print something this size I will be posting Tubes2 soon; it is about half the size of Tubes1.

This lamp will accommodate 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/.

For many more options just Google "led puck lights."