Jim is correct, as well as motsco. In high school, many years ago, I was on
stage crew, and if you touched the FOH, (Front of House) lights they bulbed
out. We called it Silzerizing, after a teacher who had a rather large noze.

Dan

"Jim Yanik" <jyanik@abuse.gov.> wrote in message
news:Xns95E26C2F99A17jyanikkuanet@129.250.170.84.. .
> "Gary and Karla" <klawre@alltel.net> wrote in
> news:gNYGd.425$811.148@fe61.usenetserver.com:
>
> > I just replaced both low beam headlight bulbs. 98 accord.Both of them
> > had a strange bubble protrusion from the side of the bulb but were
> > still burning. What would cause this?
> >
>
> The bulb installer left oils from their skin on the bulb from touching
> it.The oils carbonize from the heat,and then get the quartz glass even
> hotter,it creats a hot spot melting the glass.
>
> That is why one should use gloves or a paper towel/cloth to hold the bulb
> when installing halogen lamps.
>
> --
> Jim Yanik
> jyanik
> at
> kua.net