Rooms approved for the housing of patients shall be provided with natural light by means of glazed openings.
When windows are operable, they shall be provided with insect screens of 16 meshes to the inch.
All portions of a building used by patients, personnel or other persons shall be provided with artificial light and a mechanically operated ventilating system as specified in the California Electrical Code and the California Mechanical Code.
Each patient bedroom shall be provided with viewing windows from the corridor to allow full and unobstructed visual observation of the patient.