The average life span of those seems to be about 2-4 years. They crack and water enters and they get destroyed.
If you are planning a pool build Pentair has a new version called the MicroBrite that you should consider.
Pentair GloBright & IntelliBright colors don't match
The GloBrites are 12V and your IntelliBrights are likely 120V so the colors don't give off the same hue. This is a problem that cannot be corrected and a reason to use only the GloBrites or IntelliBrights.