I want to install a chandelier above a bathtub. What is the minimum height do I need above the bottom of the tub?

Also can more than one bedroom be on 1 acr fault breaker. And is it better to have the receptacles and lights on separtate arc faults?

Do smoke detectors need to be on arc fault breakers

This work is being done in California and the permit was pulled before October of last year.

Thank You