NBN EN 13272:2001

This European Standard specifies the design criteria of electrical lighting illumination levels in the interiors of public transport railway rolling stock for all operating conditions.
For the design of the lighting system it is necessary to take into account the tasks that are to be performed in the given area, as well as meeting safety requirements.
In addition to providing task-related illumination levels, the design of the lighting should, wherever possible, provide a comfortable and pleasing visual environment.
The specification of minimum lighting levels is necessary to ensure that tasks requiring a particular attention can be safely performed.