Mutliple bulbs have blown (sometime literally) in my outside lamp post. I
think it coresponds to electrical storms, but maybe not. Why would this
occur? No other circuits in the house seem to be effected....
Mine weren't 'blowing' but were burning out far too often (two outside
yard lights). I got tired of replacing bulbs so replaced them with
compact flouros. Haven't had a problem since. I don't know if that
would help you but it might be worth a try.
Are you using post lamp or at least outdoor rated bulbs? They are
thicker glass or have a tough coating over the glass. Even if the
bulb is sheltered, cool, moist air reaching the hot bulb will often
crack the glass or shatter the bulb.
Thanks for the suggestions...have tried outdoor-rated and florescent
bulbs--same result. The bulb is housed in a stardard lamp post housing.
That's why I think it has something to do with electrical surges...?
About the only thing I can think of that would only effect that one lamp
would be a floating neutral. There would also be the possibility of
vibration. You may want to check that possibility out as well. Fan lights
are more resistant to vibration, outdoor lamps made for that are more
resistant to moisture and higher voltage lamps (you can get 130V or 220V
lamps are more resistant to things like floating neutrals. A 220 volt lamp
will burn a lot dimmer normally, but will not go out due to a floating
One additional suggestion. Make sure you don't have aluminum wiring.
If you do, that could be the problem. If you have aluminum wire have a
professional check it out. It is a possible hazard, not just a light
problem. While it is possible to live safely with aluminum wire, it takes
some special care.
If the high voltage bulb works, then you still have a problem and I
would not want to ignore it.
I can't imagine an electrical surge causing that unless it was a really
BIG surge. The filament is in a vacuum, and pushing a lot of power
through that filament it's going to blow a bulb, I would think. (I'm
probably wrong, so a lot of people are probably going to pounce me for
Are you sure no one is coming a busting your light? Like some punk kid?
Long before any surge damages a light bulb, many other
household appliances are already damaged. Surge damage is
mostly myth promoted by those who say, "I don't know what it
is, therefore it must be a surge." Junk science reasoning
combined with ignorance of how surges and electricity work.
Don't fall for their speculations that are nothing more than
promotions of ineffective, undersized, and overpriced
Joseph Meehan has posted typical reasons for bulb damage - 1)
excessive voltage and 2) bulb vibration when bulb is hot. If
a floating neutral raises the 120 VAC only to 127 VAC, then
bulb life expectancy is one-half. Notice how little excessive
voltage can seriously deteriorate a bulb. Bulbs made with
extra tough filaments can be obtained to withstand vibration.
But surges as reason for light bulb failure (especially when
nothing else is damaged) is typically based upon wild
speculation, junk science, and myth. IOW not based upon facts
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