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Re: Light bulbs

In San Antonio someone described two identical light bulbs that they
had carefully attacked with a torch. One formed a DIMPLE and the
other formed a BUMP in the glass. The dimpled bulb was cold and the
'pimpled' bulb was hot (on) when attacked.

I suspect that halogen bulbs will behave differently from 'normal'
bulbs. Projector lamps in the old days would often develop a sizeable
'lump' on the glass as they accumulated hours of use.


At 19:41 -0700 8/21/99, David_Anderson wrote:

>...What about light bulbs? They are thin, hot, and have
>one atmosphere cross them? I know.

How do you know? I doubt that the pressure inside a light bulb gets
as high as one atmosphere *guage pressure*. Are you thinking of a
light bulb at very high altitude?

Leigh

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