Depending on how hard the light was worked, you might be surprised at how long it will last. Heat is what kills electronics (both LEDs and the drivers which power them), very often people run LEDs lights no where near 100%, as such they should last much longer than people anticipate. Of course it is a first gen one, so the original owner may have been "I paid for all that light, everything at 100!" then "why are my corals bleaching?"
