1、ANSI/IES LM-80-15 Errata #1 February 2017 p1 ANSI/IES LM-80-15 ERRATA #1 This Errata document replaces specified sections in document ANSI/IES LM-80-15 based on the post-publishing practice and users inputs. If you, as a user of IES LM-80-15, Approved Method: Measuring Luminous Flux and Color Mainte
2、nance of LED Packages, Arrays and Modules, believe you have located an error not covered by the following revisions, please mail or send a letter with your information to Pat McGillicuddy, IES Manager of Standards Development, at pmcgillicuddyies.org, IES, 120 Wall St., 17th Floor, New York, NY 1000
3、5. Additions will be posted to this list online as they become available. Please confine your comments to specific typographical errors or misstatements of fact in the documents text and/or graphics. Do not attempt a general revision of IES LM-80-15. Revised language: 6.1 DUT Photometric and Electri
4、cal Measurements For chromaticity maintenance, the chromaticity shall be expressed in CIE 1976 (u, v) coordinates. The change in chromaticity at a measurement interval at t hours shall be the geometric distance between the chromaticity at 0 hour (u0, v0) and the chromaticity at t hours (ut, vt): Original language, for reference: For chromaticity maintenance, the chromaticity shall be expressed in CIE 1976 (u, v) coordinates. The change in chromaticity shall be calculated from chromaticity at 0 hour and chromaticity (u0, v0) at 0 hours of (ut, vt) operation:
