Early LEDs were fine. Then they overclocked them a bit too much and they just break now. Too much current and so on. You can make a very simple led very bright but it won't last. If you undervolt them instead they are dim but last forever. So the deal is to have many undevolted LEDs. Ofc that is pricier...

Not exactly forever: I have a 20+ years old led "bulb" (it's large enough to deal with its own heat) that is barely able to light up a closet now...