The Mr Twister Lamp is an interesting concept designed by Swedish design firm Cate & Nelson. The lampshade is made of three independent parts that can be swivelled around allowing various increments of light to escape.
When closed, in a regular lampshade shape, small narrow openings allow chinks of light to shine through. If more light is needed in a certain position or area of the room, then with a slight rotation, extra light is exposed.
Cate & Nelson’s Mr Twister Lamp will be ideal for futuristic interiors and student-based lodgings but I’m unsure as to its appeal outside a set niche.
See: Cate & Nelson.