Can the Radial Filter be reversed in Lightroom? How is that done?

The radial filter in Lightroom starts out with a darker center and lighter to the outside... I think this is the default or at least I am hoping so and that it can be reversed to lighter center and darker to the outside or 'nothing' to the outside really is what I want.

Is any of this possible? can I make the center lighter without affecting what is to the outside of the circular filter?

TIA,

Ken