I have yet to replace any of the LED bulbs I bought at Costco in 2013. I dunno who manufactured them, or what kind of unobtainium they're made from, or whether I will jinx them by talking about it, but they just... Keep on going. Basic Edison screw-ins, from the first generation of bulbs that emitted warm light, that I've used exactly as I would any light-bulb. They weren't really expensive - maybe $2-3 apiece, though I really don't remember - and, I dunno. I hear everyone constantly complaining about their LED bulbs, and maybe they've been enshittified since, but I have absolutely no complaints.