The knob that adjusts the lamp head has broken off the stud
with the first attempt to tighten it. It was a very poor design
in that the stud head was round with two screwdriver like slots
in the head to grip the molded-on plastic knob. Turning the cheap
plastic knob just allows it to break free from the shallow slots
and spin freely. There should be a tee bar on top of the stud to
engage the knob properly. The other two knobs appear to be the same
way. The people at Designers Edge clearly have never tried using
one of these.
On the other hand, the clamp was massively strong, as it should be.
Many light clamps are so wimpy they can barely hold the weight of the lamp
let alone allow any kind of positioning. Unfortunately, due to the failure
of the adjusting knob, I didn't have the pleasure of being able to clamp
this light somewhere under the sink or car and not having to dodge it
every 5 minutes when it lets go.