The packaging says a lifespan of one year. There were 16 lightbulbs and none of them lasted a year. I documented when they were installed and how I replaced each bulb. The lamps have lasted: three months, 10 days, four months and two days, three months and 20 days, one month and 17 days are in the chandelier in my living room and are usually only switched on in the evening hours. If you like to change lightbulbs often, these lightbulbs are for you. I would not buy these lamps back from General Electric.
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