This document contains performance requirements and recommendations for electrical lighting systems in the interiors of public transport heavy rail units, under all operating and emergency conditions.This document applies only to new units. The application of this document for retro-fitting of existing units is subject to agreement between Contractors. This document also defines the requirements for testing and conformity assessment.This document does not address lighting installed in instruments or controls.This document does not address the requirements of lighting of boarding aids, e.g. moving entrance stairs or lifts.This document does not address lighting installed for indication or effect purposes, including flashing lights and decorative lighting.NOTE 1The requirements for interior lighting for urban rail units can be found in EN 13272-2.NOTE 2 The requirements for cab instrument lighting for heavy rail units can be found in EN 16186-2.