Check out the dubai lamp to see a lamp designed to be efficient and last:
[1] https://www.osram.com/ecat/PARATHOM%20Retrofit%20CLASSIC%20B...
which seemed comparable, though running at about double wattage.
Anyway, they last and last, and I'm perfectly happy with their light.
Meanwhile I upgraded everything else also, and have a few of these
[2] https://www.osram.com/ecat/PARATHOM%20Retrofit%20CLASSIC%20A...
also non-dimmable and clear, for lamps with a single E24 socket, which should be bright, at 7.5W & 10.0W, 230V/50Hz.
Still very happy with the light, but can't say much about lasting, because only about 2 to 3 years in use, while the candles are now 5 to 6 years old.
All 2700k btw. I like it that way.
edit: I should add, before that I followed the fad with the CFL stuff, none of which lasted longer than 6 months,
made ugly light, and that not even instantly(warm up), sometimes with noisy chirping.
So for me it looks like I should have skipped the CFL phase until these were available.
This is repeated a lot but not correct. All the "forever incandescent" bulbs have one thing in common: they're dim, and they have a very red color temperature. They live long, because their filaments are much colder. If you want whiter light, and more of it (because lower filament temperatures are less efficient, since they emit even more infrared, as the entire spectrum is more red-shifted and flatter), the only way with incandescent is a higher filament temperature, which inherently lowers lamp lifetime.
What changed, besides lifetime, when lamps went from around 2000-3000 hours to 1000 hours is that they got way brighter and more white. Which is what customers wanted.