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Lamp manufacturers led to solve the problem too long. ♪ ♪.
On 23 December 1924, the largest lighting companies met in Geneva (Switzerland) and agreed to create Phoebus, probably the first ever world-wide industrial cartel in history. Companies discussed product quality. The problem was that the quality of filament lamps had increased too much and their length of service threatened business. In other words, the lamps have served for so long as they begin to decline sales.
As a result of the contract, the standard service life of filament lamps was reduced to 1,000 hours. This contract is considered to be one of the first examples of planned industrial obsolescence, and the life of approximately 1,000 hours has continued.
It is notable that, with the start of the sale of new lamps, manufacturers explained: the reduction of time is due to the need to establish quality standards for light and energy efficiency. But historians who study Phoebus archival documents say that there was only one significant technological innovation in new models: a shorter life of filament. Lamps just burned before.
Today, the same problem arises in front of producers of light bulbs. The normal LED lamp has a service life of 25,000 hours, according to the standard, after which they lose more than 30 per cent of their luminance. It's 1041 days, a little less than three years. In a typical American household, the lighting lamp does not operate 24 hours a day, but on average 1, 6 hours a day. Thus, the light bulb resource is about 43 years old and there are LED-Lamps with a service life of 50,000 hours. What sustainable business can be expected to sell such products?

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