Light Bulb Pressure
Name: Matt Jazz
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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Update: June 2012