You seem knowledgeable, I am asking this sincerely.
It's a fact that right now the LEDs in MM are only operating at a certain percentage of the brightness they are capable of. This has been stated by Rick, and the fact that they can get brighter to compensate for an LED if it goes out.
If an LED has a 50,000 hour rating, which means at that time it will be 70% bright, but the software is running the LEDs at 60% of their max brightness (I'm just making that up, hypothetical), wouldn't it mean that any replacement defective LEDs (at 50,000 hours) would look the exact same? You would have some LEDs only capable of 70% brightness, some capable of 100% brightness, but all of them running at 60% brightness.
Or is the brightness relative, at 25,000 hours the LEDs will only be 85% as bright as the software is telling them to be even though they are capable of being as bright as they should be?
Quoted from calvin12:If some light board with smd's gets replaced 2 years down the line there will be a noticable difference betwen the old and new ones. These are facts of the technology.