Design icon, this family of lights has been in production since 1921. The joints work without any screws or welding - built to last. The shade is adjustable as well as the arm. You can move the shade up and down and the long arm all around - up, down, side to side. It comes with a plug and on/off switch on the cord but you can hardwire it directly to the wall and control it from a wall switch (and dim it).

E14 bulb, not included. Plug & Switch. 

From the manufacturers:

In 1921 Bernard-Albin GRAS designed a series of lamps for use in offices and in industrial environments. The GRAS lamp, as it was subsequently called, was astounding in its simple, robust and yet very ergonomic design. There are neither screws nor welded joints in the basic form. In 1927 the Ravel company purchased the patent and started production of the GRAS lamps.

Bernard-Albin Gras was one of the most innovative designer of the 20th century. The functional esthetic of his lamps and especially the design of details such as those of the arms, stems, brackets and bases were truly original and far ahead of his time. Early on Le Corbusier was seduced by the modern design and user-friendliness of the lamps and became one of Bernard-Albin GRAS’s most enthusiastic supporters using the lamps in his own offices as well as employing them in numerous architectural projects all over the world.