Hallo Work lamp by German design studio 45 Kilo was inspired by Jean Prouvés' famous Potence lamp. Minimal and precise, just like its predecessor, Hallo Work offers a concentrated beam of light rather than the overall illumination. And because the beauty of a targeted lighting is in its ability to point at objects at different levels, the clever height changing mechanism has been put in place. Designers elaborate:

We found a very simple solution for the height changing mechanism. It consists of a wire that is attached to the head and the wall piece which leads through a leather strap. The height can then be changed by moving the strap along the arm.

I love the thin delicate look of the piece. The impressive range and flexibility makes for a perfect equilibrium between form and function.