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Posted by RBM on April 16, 2008, 10:33 pm
>I have one of those Mercury Vapor yard lights. Normally when the bulb
> burns out it starts getting dim and tends to go one and off. This
> time it just stopped working. I went up and replaced the bulb and
> noticed the socket had some black staining on it. The fixture should
> not be leaking water. Of course anything is possible. I am
> considering that dust and stuff combined with moisture could cause
> this too, however I do not recall seeing this in the past.
>
> With the new bulb, it still does not work. This makes me wonder if
> it's the sensor or could the ballast have gone bad and that's the
> black stain? I realize no one can answer this for sure, but has
> anyone ever seen a ballast die, and does it leave a stain on the
> socket? I suppose I got to take the whole fixture down, and working
> on poles is not my idea of fun....
>
> Thanks
once you open the fixture and expose the innards, you may find where the
black stuff came from. Sometimes the igniter blows, and not the ballast .
Depending upon the fixture you may be able to get replacement parts
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