Haven't had them for a very long time so I can't confirm their longevity. I only needed a lightbulb for my ultra range fan. I use this light a lot when I cook every day. It fits perfectly and glows brighter than the other bulb in this fan, which is good. I have built in lights in my kitchen, I think they will work too. So buying in bulk saves me a trip every time a lightbulb burns out. The price was great because the last time one of these bulbs went out, a bulb at the hardware store cost me almost $8. The pear only lasted a year. These were also shipped fairly quickly. So I would buy them again when they run out.
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