Living Wallpaper's Paper Lampshade
Fuse interfacing to one side of cardboard and cut the base structure from this. Cut an extra leaf shape from plain paper (no interfacing). To assemble the paper leaf lampshade you'll need to fold the base structure and use an iron to fuse (glue) the tabs to the leaf so that it maintains its shape. See photos.
Download Illustrator file: Attach:LivingWallpaper_paperLampshades.ai
Photos of the assembled lampshade
Photos of illuminated lampshade