The ANSI/IES LM-80 test tells the lumen maintenance and the chromaticity shift but it does not indicate the estimation of the shift, while the TM-35-19 should do so.

In the “Lumen and Chromaticity Maintenance Behavior of Light-Emitting Diode (LED) Packages Based on LM-80 Data” from U.S. Department of Energy, several case studies based on different LED materials (ceramic, CSP, polymer) are introduced.

From the analysis, it is found that the TM-35-19 provides reasonable and often conservative estimates of chromaticity shift magnitude, which is particularly important for some applications.