Did anyone mention "How close the house is to the utility transformer?" Here in my house, the transformer is right outside my house. The voltage I have coming into the house is approx. 125-127 volts. My bulbs use to pop all the time. I need to buy the 130 volt bulbs. If the house is farther away from the Utility trans, I have seen voltages as low as 120 to 106 volts.
