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light bulb pressure - Printable Version +- MacResource (https://forums.macresource.com) +-- Forum: My Category (https://forums.macresource.com/forumdisplay.php?fid=1) +--- Forum: Tips and Deals (https://forums.macresource.com/forumdisplay.php?fid=3) +--- Thread: light bulb pressure (/showthread.php?tid=59701) Pages:
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light bulb pressure - pbarra1 - 08-06-2008 what is the gas pressure inside a regular incandescent bulb. GIA Re: light bulb pressure - BigGuynRusty - 08-06-2008 [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 Re: light bulb pressure - pbarra1 - 08-06-2008 in a workshop and last demo proved it's not a vacuum. In order to explain each demo requires the exact internal pressure. Re: light bulb pressure - OWC Jamie - 08-06-2008 no vacumn inert gas nitrogen or argon or a combination IIRC. Halogens of course are filled with halogen gas. Re: light bulb pressure - JoeH - 08-06-2008 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. Re: light bulb pressure - BigGuynRusty - 08-06-2008 [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 Re: light bulb pressure - papercup - 08-06-2008 Read the dials @ 3:20 http://www.youtube.com/watch?v=BylLOWRojyY Re: light bulb pressure - Tofer - 08-06-2008 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 Re: light bulb pressure - Filliam H. Muffman - 08-06-2008 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. Re: light bulb pressure - lafinfil - 08-06-2008 [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. |