标准号:IS 9974 Pt.1-1981
发布日期:1982/1/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围: This standard ( Part I) specifies the electrical characteristics for lamp with or without internal starters operating on 250 V together with information for ballast, ignitors where essential, and luminaires for design purposes in respect of high pressure sodium vapour lamps.