I currently have a 3600 Lumen torchiere lamp in my office. I love that it lights the whole room. It has a physical dimmer knob, and I have it in an outlet with a smart-switch.
However I would love to get a high-lumen lamp like that, which can be dimmed via hubitat.
With such a bright light(s), what ever you decide, make sure you are not exceeding the capability of the switch/Outlet/dimmer you end up using.
Ask me how I know!
Does the brick list the power output to the lamp? Sound like the lamp is low voltage and the dimmer knob is just a potentiometer. Depending on that, you might be able to replace the brick with a dimmable power supply with the same voltage output, and then dim the whole thing with a dimmer outlet.