How is that a problem?
Surely the lights can be on "out of hours"?
There are airfields that are only licensed at weekends, for example.
And then there are quite a few - such as Fife - that are now unlicensed.
Dare I suggest that lights, the maintenance of them to a given standard and even the leccy to power them are a cost which people have historically been reluctant to pay through landing fees - because you don;t pay in other countries, so why pay here?