Re: Outside light
If its an entrance it requrires illumination, on the exterior. However the luminaire can be mounted to light the stair hatch and back door both.
210.70 (b) For dwelling units, attached garages, and detached garages with electric power, at least one wall switch?controlled lighting outlet shall be installed to provide illumination on the exterior side of outdoor entrances or exits with grade level access. A vehicle door in a garage shall not be considered as an outdoor entrance or exit.
Illumination from the inside would not be in compliance with the NEC.