[afiori]

The claim of the video is that lifetime, efficiency, and luminosity cannot be optimized independently.

Meaning that the best 2000 hours incandescent lightbulb is either less luminous or less efficient (or both) than a well built 1000 lightbulb.

Wether the cartel was nefarious is slightly beyond the point and primarily of historical interest.

As a "proof" the centennial lightbulb is about as luminous as a candle, that is useless in almost every case.

It is impossible to build a new centennial lightbulb that anyone would want to buy outside of niche industrial or artistic applications.