Designed by Jean-Sebastien Lagrange in collaboration with the French design studio Chevalvert, the L-INK lamp consists of a sheet of paper covered with conductive ink that turns on and off when the bottom portion is folded and unfolded.
Dezeen reports that there are LEDs on the poster which light up when a magnet on the bottom right corner is folded up to touch another, completing the circuit. These are scattered along the curving pattern of lines and a row is placed on the fold to create an uplight.
The bottom of the poster is cut at an angle so it appears horizontal when it is folded and there are wires hanging behind to connect the circuit to an electricity supply.
L-INK is on display at the Biennale Saint-Étienne until the end of the month. Click through to see pictures of the poster/lamp: