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Name: Matt Jazz
Status: Student
Age: 18
Location: N/A
Country: N/A
Date: N/A

I would like to know what preasure is in a standard light bulb (100W, 220V and 2W, 12V).

As far as I know Lightbulbs are not filled with any gas and are made with vacuum so there is no or very little pressure inside. Fluorescent lamps do use gases though.


Up-date January 2007
Typical incandescent light bulbs have tungsten filaments. Some used to be manufactured with a vacuum on the inside. Now they are filled with argon and/or nitrogen. It is often at very reduced pressures so that the bulb will not explode when hot.

Nathan A. Unterman

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