Can outdoor lighting stay outside the billing?

Yes, you arrange this in the meter cabinet by connecting the group with outdoor lighting to the always-on section of the module. That lighting then doesn't count toward the guest's credit and will continue to work even when the credit runs out. This works well if the group only operates outdoor lighting; if older installations also have a billable space on the same group, usually a small adjustment to the wiring is needed. You can also choose to include ambient lighting in the billing instead.