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by torginus 686 days ago
Actually Technology Connections made a great youtube video on this: https://www.youtube.com/watch?v=zb7Bs98KmnY

The gist is that by running bulbs at a lower power, you can greatly prolong its life, but the downside is that it doesn't heat up as much, and since emissions spectrum correllates with temperature, ends up being much worse at converting electricity to light, which ends up being not worth it.