Abstract: A lamp head mounting assembly for securing a lamp head to a lamp support arm is disclosed in which a support boss having a base, at least one arcuate wall upstanding from the base, and an open top secured to the lamp head. A pivot bearing is mounted in the boss for rotation on a first axis generally perpendicular to the base, the pivot means having a spindle extending therefrom generally perpendicular to the first axis of rotation and defining a second axis of rotation. The spindle is pivotally mounted in the lamp support arm for rotation about the second axis. A top is provided on the boss and clamped to it to apply a first clamping force to the pivot means between the top and the base of the boss. An additionally manually adjustable clamping device is provided to apply additional force to the pivot means to resist pivotal movement thereof and hold the lamp head in a fixed position.