Are you thinking of the Phoebus Cartel? https://en.m.wikipedia.org/wiki/Phoebus_cartel https://en.m.wikipedia.org/wiki/Phoebus_cartel I suppose it's accurate

Are you thinking of the Phoebus Cartel? https://en.m.wikipedia.org/wiki/Phoebus_cartel https://en.m.wikipedia.org/wiki/Phoebus_cartel I suppose it's accurate to call it a conspiracy since they literally conspired to divvy up markets and set predetermined bulb lifetimes.