LM-80 is the approved standard for testing and reporting on lumen depreciation/maintenance of a particular LED chip, LED array or LED light source that is incorporated into a particular Superlight LED lighting product. LM-80-08 measurement data is applicable exclusively to the LED light source package, rather than the whole luminaire or LED lighting system. The LM-80-08 standard specifically describes the testing method and measurement of the LED light source.
LM-80 test reports will typically consist of multiple data sets, each reporting the absolute luminous flux values relative to the LED drive current, over a duration of 6,000 hours and/or 10,000 hours, as set out in the LM-80-08 standard. In addition to the luminous flux, the nominal chromaticity shift will also be recorded in the data set. The measurement of the luminous flux values will be repeated across 3 different LED temperatures: 55ºC, 85ºC and a third temperature which is nominated by the LED chip or LED package manufacturer.
LM-80 itself does not provide guidance or make any recommendation regarding predictive estimations or extrapolation for lumen maintenance determined from actual measurements.