Today a Compact Florescent bulb is rated at 6,000 hours.... if you use it as per their guidelines. LED lights are said to last up to 50,000 hours.
Before 1924 an incandescent light bulb would last 1,500 to 2,000 hours. However in 1924 the Phoebus cartel decided that it would be better to shorten that lifespan to 1,000 hours. The light bulb companies would send in samples to a laboratory in Switzerland for verification. If they lasted too long or too short they would pay a fine.
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