Check your local bldg code
Here ('97 UBC) natural light is required in all habitable rooms except kitchens. They may be provided with artificial light.
bathrooms, closets, halls, storage or utility spaces are not habitable.
So all you need to pass is one luminaire in the kitchen, if you don't have any windows.
In CA, our energy standards kick in and you have to provide high efficacy luminaires in certain locations. Pretty much you have to install luminaires everywhere except a bedroom and a hallway (going by memory here). There are some trade offs.
Hotline,
Having the power on makes things easier for final, but unless you have local ammendments, I would say it's not enforceable by the letter of any code. We're talking residential only here.
