That's good that you found the Repti-Sun 10.0 tube. Since you have that one, you really don't need the Zilla UVB and there have been some health issues when using those. It's also important that they have an area where there is no UVB so they can escape it if they want so if I were you, I would remove the Zilla entirely.
How is she acting and eating?
How is she acting and eating?