I suggest you check the voltage provided by your power company.
A few years ago my air conditioning unit went offline a few times due to an over voltage sensor. After checking and confirming an over voltage condition and unable to get a response from the local power company office, I wrote a letter to the state Public Service Commission.
Power Company responded within 1 week and determined they had a problem and eventually determined the problem was a voltage controller at a substation. The controller would raise the voltage if needed under a high load, but would not reset as the load decreased so the voltage would rise out of specifications.
I found out later that many people had to replace quite a few bulbs during this time.
In this instance, voltage isn’t the problem. The transformers were recently checked. The lady I was talking with who had a similar issue as me lives 30 miles away and is with a different power company. Numerous people have had problems with bulbs made in the last two or three years.
Thanks for your reply though.