The wikipedia article you linked quotes a source which directly contradicts what you are saying. From: https://spectrum.ieee.org/tech-history/dawn-of-electronic

The wikipedia article you linked quotes a source which directly contradicts what you are saying. From: https://spectrum.ieee.org/tech-history/dawn-of-electronics/the-great-lightbulb-conspiracy https://spectrum.ieee.org/tech-history/dawn-of-electronics/t... > Their lightbulbs were of a higher quality, more efficient, and brighter burning than other bulbs. They also cost a lot more. Indeed, all evidence points to the cartel’s being motivated by profits and increased sales, not by what was best for the consumer. It would have been straightforward for them to manufacture higher voltage, less brighter lamps with a longer lifespan. They didn't.