It could be the source of the bulbs that you are buying. (May be Chinese made) Try getting them from another store, or maybe going with an L.E.D. bulb. If this doesn't help, get it checked by an electrician. You might have a bad power source at the campground. (Voltage Spikes) Also, I have a bent bulb holder on my Travel Trailer hood light. It will not stay lit either. Could be the socket that holds your bulb isn't making a good connection and could be arcing from socket to bulb. Just my opinion fwiw
Edited by: guapo
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