Hey Guys,
The NEC is not the only building code we have to satisfy. As alluded to here several times, there is a building code that requires illumination in every room of the house.
The International Residential Code requires in section 303 that every habitable room be provided with windows or artifical lights. All interior and exterior stairs need artifical lights, and bathrooms need either a 3 square foot window or artifical light and an exhaust fan.
