The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.

To search for another term please use  "Back to the list" to return to the main page or the e-ILV.

For the complete set of terms and definitions CIE S 017:2020 can be purchased from the CIE Webshop. Members of a CIE National Committee or Associate National Committee have access to a 66,7 % discount on the purchase price of the standard.

For advice on CIE Publications contact Note the CIE Helpdesk cannot assist with technical enquiries.


reference ballast

special ballast designed for the purpose of providing comparison standards for use in testing ballasts, for the selection of reference lamps and for testing electric lamps from regular production under standardized conditions

Note 1 to entry: A reference ballast is typically inductive for electric lamps operating on AC mains frequencies or resistive for electric lamps operating on high frequency or low frequency square waves.

Note 2 to entry: A reference ballast operated at its rated frequency has a stable voltage/current ratio that is relatively uninfluenced by variations in current, temperature and magnetic surroundings.

Note 3 to entry: This entry was numbered 845-08-36 in IEC 60050-845:1987.

Note 4 to entry: This entry was numbered 17-1047 in CIE S 017:2011.

Publication date: 2020-12
Copyright © CIE 2020. All Rights Reserverd.