Normal desk magnifying lamps are expensive, bulky and cumbersome.
Then I saw 6€ sewing led light magnifying lence in LIDL....It's only 2x, but light weight and about 120 mm dia.
I also had next to useless magnetic base.
It only needed one bushing to join magnetic base to disassembled light arm and then it is nearly ideal: No rim, no tube and no need to be overly carefull with it.
Pekka