Does LED PAR Really Drop Dramatically over the course of a Year?

I just read this Post.



"I was at a local, high end, fish store yesterday. Told the owner i was starting a new system. He asked me about lighting and i told him T5. His response was, "Good you're not falling for the LED scam". He went into detail about LEDS and how their PAR value decreases dramatically over the course of a year. I wasn't buying any equipment from him so i don't see why he would lie.



I purchased my first ATI fixture a few months back. The growth, overall health, and color on my SPS corals is amazing. I NEVER had success with sps before with my LEDS."



So does LED PAR Really Drop Dramatically over the course of a Year?



I have not heard that before.



I thought that LED kept the Same PAR for it's entire Life until they just Burned Out and had to be Replaced with a New LED Fixture which usually takes 50,000 Hours of Use or about 17 Years.