No springs, no knobs
Adjustable lamps mostly hide their physics — springs inside joints, friction inside knobs, all of it wearing out in private. This lamp does the opposite: a steel counterweight rides the stem in plain view, and where the weight sits is exactly where the shade floats. One finger raises the light; the mechanism is the explanation.
The stem is drawn steel tube, the foot a cast iron disc, the shade a spun aluminium hemisphere on a ball joint. Nothing is decorated and nothing is concealed, which after a hundred prototypes we can report is the more demanding of the two disciplines.
Serviceable forever, or thereabouts
The lamp dismantles with one hex key into eleven parts, every one of them flat-stocked or catalogue-standard. The counterweight doubles as the packaging's ballast, the cardboard box converts into the shipping-damage test rig (drop it; the lamp should not care), and the care manual is one paragraph long. Warranty claims to date: a chewed cable. Dog.