Newbie level 1
I just recently replaced a light bulb in the hallway which has the switch downstairs and one upstairs. I replaced it with a energy saving spiral bulb. We noticed shortly after that even when the light is off, the bulb will flash every couple of minutes. Then this bulb burned out after less then a month. Is it just the light bulb or is it the switch that is faulty? I don't want to have a fire if there is a problem with the wiring.