This light bulb lasted 9 years before I had to replace it. I write the date on lightbulbs that say 5 years or 7 years to see if they really last that long. This bulb's packaging may not say how long it would last, but I installed one of these bulbs in my home in May 2005. I just had to replace it now. This lightbulb was in my master bathroom and was used every day. .
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