IS 9974 : Part 1 : 1981 SPECIFICATION FOR HIGH PRESSURE SODIUM VAPOUR LAMPS PART I GENERAL REQUIREMENTS AND TESTS UDC 621.327.532 ETD 23
Reaffirmed 2017
1. Scope
1.1 This standard ( Part I) specifies the electrical characteristics for lamp with or without imernal starters operating on 250 V together with information for bnllast, ignitors where essential, and luminaires for purposes in respect of high pressure sodium vapour lamps.