Planned obsolescence does happen, but the phoebus cartel is the worst 'example' of it.
This point is only relevant if 1000 hour old bulbs cost more electricity to run than new bulbs. Maybe I don't understand how old bulbs worked but why couldn't they invent ways to make bulbs run hot which also last longer than 1000 hours.
I was just talking about organization of competitive companies for price manipulation, but specifically controlled for the benefit of the public - such that we don't lose the US plant due to natural market forces.
It's why ULA is still in business despite SpaceX being significantly cheaper.
They last a lot longer.
Or require no fines at all. It's much simpler to sell a non-sickly looking bulb at the store and other companies would converge.
Such that the market forces don't push pricing that the plant would naturally die.
[0] https://en.wikipedia.org/wiki/Phoebus_cartel