Artikel 9

1. All crew spaces shall be adequately lighted. The minimum standard for natural lighting in living rooms shall be such as to permit a person with normal vision to read on a clear day an ordinary newspaper in any part of the space available for free movement. When it is not possible to provide adequate natural lighting, artificial lighting of the above minimum standard shall be provided.
2. In all vessels electric lights shall, as far as practicable, be provided in the crew accommodation. If there are not two independent sources of electricity for lighting, additional lighting shall be provided by properly constructed lamps or lighting apparatus for emergency use.
3. Artificial lighting shall be so disposed as to give maximum benefit to the occupants of the room.
4. Adequate reading light shall be provided for every berth in addition to the normal lighting of the cabin.
5. A permanent blue light shall, in addition, be provided in the sleeping room during the night.