I bought a bunch of these from Revain as I couldn't find them anywhere else and they are all over my house. They last about 4-1/2 years with daily use. I have several outside my home that are still working after 5+ years. My main issue is that it's difficult to get them out of the nest without damaging the tubes. It took a few blown lightbulbs before I could get the dead ones out. But they are quite easy to enter and light up the room well.
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