I think the life expectancy was 2 years on them, that being said they have been working quite well for me. Fixture itself is nice, fans are not that noisy. Coral growth has been OK, true mix of softy/LPS/SPS. I have 2 over a 120 and only complaint is they don't fully cover the tank, edges are a little dark but over all I'm happy and for what we paid I would get them again.