This is the second edition of CSA C819, Performance of general service fluorescent lamps.

The following revisions are included in this new edition:
(a) types of lamps covered by this Standard have been clarified;
(b) references and definitions have been updated;
(c) CRI exemption has been increased to 87 or greater;
(d) efficacy and CCT levels have been revised; and
(e) a normative Annex, "Uniform test method for measuring average lamp efficacy (LE), colour rendering index (CRI), and correlated colour temperature (CCT) of electric lamps", has been added.

CSA acknowledges that the development of this Standard was made possible, in part, by the financial support of Hydro Québec, BC Hydro, Manitoba Hydro, SaskPower, Ontario Ministry of Energy, Canadian Electricity Association, Ontario Power Authority, and Conserve Nova Scotia.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.