That page is also why the popular depiction of the Phoebus cartel (as in: they intentionally made 1000h bulbs, but could have made 3000h bulbs instead that were otherwise identical, like e.g. Veritasiums popular video) is wrong. For classic incandescent bulbs, color temperature and lifetime limit each other. It is not possible to make a 2500K incandescent bulb that lasts longer than about 1000 hours, and a 3000 hour bulb will always have a dim and warm output. Because that's how it gets to 3000 hours.