I know some people who write the date on their light bulbs (incandescent, no less) and switch brands if the bulbs burn out too quickly. For $10/bulb, those people would likely get their refunds, but I agree - for bulbs lasting five years, not a lot of People are going to be redeeming this warranty. The good news, is that Cree probably has a very good idea what the failure rate will be, and it's likely that the vast majority of these Lightbulbs are going to last more than 10 years.