Bought $3000.00 worth of those exact Hyperikon LED lights for an LED conversion for our church. FANTASTIC!! The product, and even more so the company, are top notch. 3 or 4 lights were DOA and they overnighted new ones to us. Their "hassle-free UNLIMITED 5 Year Warranty" is very hassle-free. We had a total of around 5 or 8 lights go out in the first few months. They replaced them without any questions. The first few, they had me ship back to them (on their dime) so they could investigate to make sure there was not a production problem. The others, they just sent out new bulbs, no questions asked.
The told me that, if they are going to burn out they usually do so in the first 90 days and if they make it past that they are usually good for a very long time. We bought ours in June of 2015, had the couple fail that I mentioned above and no failures since.