When one of them failed on my casita's front exterior light I found a replacement at an RV store. For the money I paid for it I could buy 10 of these. A 5 pack should last you the rest of your life. They are easy to remove and even easier to insert. Warning: Be careful when replacing as the 12V line can easily be shorted and the fuse blown. Replacing them is harder than replacing a switch!
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