LED Signal and Marking Lighting Devices J1889_201907

DOI: https://doi.org/10.4271/J1889_201907

Issuing Committee: Signaling and Marking Devices Stds Comm

Publisher: SAE International

Pages: 9

Rationale: The 2015 revision of SAE J1889 expedited production testing, yet allowed previous methods when appropriate. The purpose of the 2019 update is twofold: 1 To allow industry to take advantages of new technologies, such as camera-based photometry (SAE J3100). This requires a better definition of photometric stability. 2 To allow shorter warm up times, when appropriate, by use of pre-determining minimum ratio. This could facilitate more frequent production quality checks. Additional concerns are addressed related to minimum photometric values not being measured at 30 minutes per the 1999 version of SAE J1889 and the use of that version by Transport Canada when conducting compliance audit testing of LED lighting devices, as indicated in their Road Safety Bulletin published August 2004. Changes to this version will reference 30 minute photometric values by direct measurement or by a ratio method from a pre-determine ratio value.