I have a lamp that uses this lamp size. For almost 30 years now. I have only changed the bulb 3 times so when I bought 5 packs in May 2019 I figured they would last a very long time. It is March 2020 and we have just installed the 4th lamp from the order. The lamp requires loosening small screws and very careful handling of the bulbs without leaving fingerprints. We wear gloves when handling it. Changing them is very tedious and inconvenient, so I'm disappointed that they didn't last longer. Be prepared to change lightbulbs more often.
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