. I have an outdoor solar powered light (It only comes on after the sun sets) I was averaging about 1 month between incandesant light bulb changes, before switching to compact flouresent bulbs. The light fixture has 5 sockets to it (Think old street lamp) and 4 of them have had the same bulb for over 4 years now, with no problem. 1 of the 5 keeps blowing bulbs now. I've tried replacing the flouresent bulb, and I've even tried installing an incadescent bulb. The flouresent bulbs will last a day or so, but the incadescent bulbs don't last at all. Any Ideas ? I've checked the sockets and removed debris, and checked the wiring. While it's not shiney and new, it is not any worse than the others.

Have you measured the voltage to be sure it is correct for the lamp?

No I haven't. I'm guessing I should check this at night, when there is power going to the lamp ? It was here when I bought the house, and all the wiring is buried. I've checked my breaker box (outside) and I see nothing for that light.