Its fully printable, all normals have correct orientation. Should leave a square lattice shadow on the floor. Intended to be a lamp.
STL (Stereolithography, filesize: 10.9 MB), OBJ (OBJ, filesize: 12 MB), FBX (Autodesk FBX, filesize: 4.79 MB), DAE (Collada, filesize: 226 KB), GLTF (glTF, filesize: 187 KB), ABC (Alembic, filesize: 137 KB), BLEND (Blender, filesize: 1.05 MB)