Node properties panel displays the transformation properties of the node:
You can edit the same translation, rotation and scale parameters that you edit using gizmo. Actually using gizmo is probably the best way to edit this, so the panel can be used just for fine tuning the parameters.
Note that the panel displays the node name in its title, so you always know what node you are working with.
For light nodes Owlet displays slightly more parameters:
The extra parameters are: