This standard BS 469:1995 Specification for railway signalling lamps is classified in these ICS categories:
29.140.99 Other standards related to lamps
45.040 Materials and components for railway engineering
This British Standard specifies the requirements for railway signalling lamps and gives the testing procedures required to establish conformity to the requirements, based upon statistical evaluation against an acceptable non-conformity level.
Requirements, testing procedures and conditions, statistical sampling.