Section 27-2039. Lighting to be provided at night; owner's responsibility

a.
  The  owner  of  a multiple dwelling shall turn on all required lights in
  every public hall and stair at sunset every day and shall keep  them  on
  until sunrise the day following.
    b.  The  owner  of  a multiple dwelling shall keep all required lights
  burning continuously (1) in every fire stair  and  fire  tower;  (2)  in
  every  stair  and  public  hall  where  there  is no window opening on a
  street, court, yard, space above a setback, or on a shaft;  and  (3)  in
  every stair and public hall where there is a window which in the opinion
  of the department does not provide adequate natural light.
    c.  The  owner  of a multiple dwelling shall provide electric light at
  all hours of the day and night in rooms or spaces in multiple  dwellings
  in  which  laundry  equipment  is  provided  for  the  common use of the
  occupants whenever natural light is insufficient in the opinion  of  the
  department.
    d.  The  owner  of  a  multiple dwelling shall install and maintain in
  working condition a lighting fixture that can be turned on by  a  tenant
  or  by the mail carrier directly over a mail box or other receptacle for
  mail if the natural light in the public hall is not sufficient  to  read
  the names on each mail box or receptacle.
    e.  The  owner  of a multiple dwelling shall not be responsible if any
  required light becomes extinguished and remains so  if  such  owner  can
  show  to  the satisfaction of the department or the court that it became
  and remained extinguished without his or her knowledge or consent.