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Incandescent light bulbs were designed to fail after x number of hours.See the package.
The glue used to seal the bulb dries at a known rate then cracks and lets air in to destroy the filament.
Florescent bulbs are now produced to do the same.
L.E.D. bulbs will probably go the same route when they figure out how to engineer the life of the bulb.
This is designed obsolescence and it is legal?
Phil
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