More materials
Other materials, often cheap, readily available in bulk or discarded are upcycled into lamps.
PETsun
PET bottles, rubber bands.
For instructions on how to build this lamp visit my instructables page.
Aperosun
Living room lamp consisting of the 100 mL disposable plastic cups popular at Swiss aperos (receptions).
Oloid
The oloid, a shape obtained by connecting all points of two interlocking circles to each other has some interesting geometrical properties. Despite looking quite "bendy" it possesses no curvature, which means that it can be made perfectly using flat paper (contrary to the sphere, where each attempt at constructing it using paper it is only an approximation).
For more information on the oloid visit the wikipedia page about it.
Galaxy
Lit celestial globe, string lights, Neapolitan Christmas decorations and LED bar sign.
Mirror cube
Mirrors, wood.
Inspired by a lamp by Kitty Krauss.