IS 9589 : 1980 SPECIFICATION FOR ELECTRIC LAMPS FOR RAILWAY SIGNALLING UDC 621.326.75:656.25 ETD 23
Reaffirmed 2017
1. Scope
1.1 This standard specifies the technical requirements for the railway signalling lamps given in Table 1 and the methods of test to be used for determining their quality and interchangeability.