I guess Govee doesn't want to sell accessories separately, so I've modelled both style of brackets that originally came with the light bar.

Mount Govee light bars to clamp style monitor stands. I use the light bars as desk lamps, so the bracket is angled down slightly to better illuminate the desk. Stick the horizontal mounts (came included with the lights) to the big flat surface of this bracket.

Update: added a model of the rear mount, use double sided tape
Update 2: added a vertical stand