08-06-2008, 06:50 PM
what is the gas pressure inside a regular incandescent bulb. GIA
light bulb pressure
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08-06-2008, 06:50 PM
what is the gas pressure inside a regular incandescent bulb. GIA
08-06-2008, 06:53 PM
[quote pbarra1]what is the gas pressure inside a regular incandescent bulb. GIA
Not high pressure, it is under a vacuum.
Why are you asking? BGnR
08-06-2008, 06:57 PM
in a workshop and last demo proved it's not a vacuum. In order to explain each demo requires the exact internal pressure.
08-06-2008, 07:00 PM
no vacumn
inert gas nitrogen or argon or a combination IIRC. Halogens of course are filled with halogen gas.
08-06-2008, 07:01 PM
Standard bulbs contain a near vacuum, otherwise the filament would burn up. Some bulbs use inert gas such as argon, but those are more expensive.
08-06-2008, 07:01 PM
[quote pbarra1]in a workshop and last demo proved it's not a vacuum. In order to explain each demo requires the exact internal pressure.
Depends on the bulb.
Contact the manufacturer, seriously. BGnR
08-06-2008, 07:05 PM
08-06-2008, 07:07 PM
Edited: this is what I get for opening a link and waiting 15 minutes to reply...
Are you sure it's a vacuum? I understood that it was filled with argon gas. -Tofer
08-06-2008, 08:03 PM
In an much older version of that video, I remember hearing that bulbs were filled with argon gas at a partial vacuum when cold so that the bulb would not be under much pressure if they broke when turned on. Hot glass shards spraying around a room could ruin your day.
08-06-2008, 09:57 PM
[quote Filliam H. Muffman] Hot glass shards spraying around a room could ruin your day.
True that ! I was photographing at an event and the videographer working next to me had a 250 watt quartz bulb blow. It was in a Lowell Tote-a-Light and the idiot didn't have a safety cage on a bare bulb. The hot glass shards started a small fire on the carpet and a chair. |
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