Rated Life (of a lamp)
Alternative term: Expected Life (of a lamp)
A predicted value for the life of a given type of lamp, obtained by statistical methods based on the life tests.
Note: The term Average Life is sometimes loosely used for "rated life".
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM