Last year I bought 6 Cree “True White” LED light bulbs. Over the last few months, 4 of them have burned out: not so good for something with a 5 year warranty. I wrote to them and they sent me upgraded replacements. Hurray for Cree!
That’s better than the 10-year warranty Calphalon pans I tried to return. They required that I mail them back. The $60 postage for UPS ground (and maybe $30 for USPS but I didn’t bother checking) would have cost more than the pans :-( So out on the street they went.