A fake folded paper lamp shade which fits a standard E14/E27 LED bulb.
Update: Uploaded scripts.zip containing the python (3) code to generate these stl:s (and a few others) if you want to make changes.
Just unzip and run vasegenerator.py.
Unfortunately the code is poorly documented. See the description for Scripted vases for some more info.
Here is how to build it:
PLEASE only use a low power LED bulb and check that it does not get too hot. If you use a regular light bulb (15W or more), the plastic will probably melt, catch fire and burn down your house and family.