@jwcph@edavies@yngmar and one last point. While I don't want to toot my own horn, if you don't understand what I'm saying, that video I made explains it very well.
Incandescent light bulb technology always had a trade-off between energy efficiency and lifespan. If you overdrive a tungsten lamp, you can get energy efficiency rivaling LEDs! But it will only last seconds. I demoed that.
1,000 hours was simply a decent sweet spot which the cartel standardized on and enforced.