Regulation 48 Lighting systems Requirements for ships constructed on or after 1st September 1984I1

The main source of electrical power in every ship shall be capable of illuminating any part of the ship normally accessible to and used by the passengers or the crew.

The emergency electric lighting shall be arranged so that a fire or other casualty in spaces containing the emergency source of electrical power, the associated transformers, if any, the emergency switchboard and the emergency lighting switchboard will not render inoperative the main electric lighting system as required by paragraph (1).

Lighting fittings shall be arranged to prevent rises in temperature which would be damaging to the fitting or the electric wiring or which would result in a risk of fire.