The lightbulb in your ceiling is designed to burn out.
Not because the engineers couldn't do better. Because, in 1924, a group of the most powerful companies in the world decided that a longer-lasting bulb was bad for business.
They called themselves the Phoebus Cartel. The founding members included General Electric, Philips, and Osram, along with most of the major lightbulb manufacturers in Europe and the United States. Between them, they dominated the global market for incandescent bulbs.
The problem they were solving was not a technical one.
By the early 1920s, bulb technology had advanced far enough that household lightbulbs could routinely last between 2,000 and 2,500 hours. Some lasted longer. The industry had, in a sense, done its job too well. A customer who bought a bulb might not need another one for years.
That was the problem.
In 1925, the member companies formalized an agreement: the lifespan of all Phoebus-standard lightbulbs would be capped at 1,000 hours. Any manufacturer whose bulbs regularly lasted longer would face financial penalties.
The cartel enforced compliance through a testing program. Bulbs were sampled from production lines. If a company's output exceeded the 1,000-hour threshold, the company paid a fine. If bulbs fell too far short, they also paid. The target was precise: a product engineered to fail at the right moment, not a moment too late.
The documents survived.
Researchers found the internal records: the testing protocols, the penalty schedules, the correspondence between executives. The cartel had kept meticulous notes on exactly what it was doing and why.
The Phoebus Cartel began to unravel as World War II disrupted global trade and communications. By the mid-1940s, the formal structure had collapsed.
But the standard it had imposed did not disappear with it. The 1,000-hour expectation had become embedded in manufacturing culture, in consumer expectations, and eventually in the design assumptions of an entire industry.
The Phoebus Cartel gave a name to something that would become a defining feature of 20th-century commerce: planned obsolescence. The idea that a product should not outlive its profitability.
The bulb in your ceiling burns out on schedule.
It always has.