Here is more detail on the CXA Family’s performance over time. The lines above show the amount of color shift seen by the CXA Family at various color temperatures over 6000 hours of operation. Each of the CXAs tested shifted less than a 2 step MacAdams ellipse over 6000 hours. This means that over 6000 hours for each CXA the shift in color is smaller than what can be discerned by the typical human being.