NCO.IDE.H.115 Operating lights
Helicopters operated at night shall be equipped with:
(a) an anti-collision light system;
(b) navigation/position lights;
(c) a landing light;
(d) lighting supplied from the helicopter’s electrical system to provide adequate illumination for all instruments and equipment essential to the safe operation of the helicopter;
(e) lighting supplied from the helicopter’s electrical system to provide illumination in all passenger compartments;
(f) an independent portable light for each crew member station; and
(g) lights to conform with the International Regulations for Preventing Collisions at Sea if the helicopter is amphibious.