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Posted by Andrew Gabriel on October 23, 2007, 7:42 pm
 

No you don't.
You would need 1000 CFL's to get the same amount of mercury as
the average person has in their body (mainly as fillings initially,
but it migrates harmlessly around the body).


That's correct in the EU. The actual value used nowadays has
been reduced to 3mg by most manufacturers.


That's an amalgum which absorbs and releases the mercury in order
to maintain the mercury vapour pressure in the gas discharge at
the correct level. (The other way to do this is to have a piece
of cold tubing connected which is out of the discharge, as it's
the coldest area of the gas fill which effectively sets the
mercury vapour pressure for the whole of the discharge.)


The "blob" mostly isn't mercury, although it will have some
mercury absorbed into it. By end of life, much of the mercury
will have been absorbed into the phosphor, the glass, and the
tube electrodes, where it no longer works, and this is one of
the reasons the lamp gets dimmer (although drop off of the
phosphor efficiency is the main one). But as I said, the total
amount is far too low to be a hazard.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Posted by Arnold Walker on October 23, 2007, 8:54 pm
 


It might also be noted that mercury does leave the human body after contact.
In either air or touch.......so yes the amount might be small, but every
little bit adds up.
And one of the main fears over coal burning ....when we are not talking
mercury content
in light bulbs.

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Posted by Jim on October 25, 2007, 1:40 am
 

    What's it alloyed with???


although it will have some


Posted by Neon John on October 22, 2007, 6:29 am
 wrote:



No you don't.  Elemental mercury is relatively harmless, certainly less toxic
than
other common household chemicals such as iodine.  Besides, there are only a few
milligrams of mercury in a CF.

John
--
John De Armond
See my website for my current email address
http://www.neon-john.com
http://www.johndearmond.com  <-- best little blog on the net!
Tellico Plains, Occupied TN
Nuke the Whales!


Posted by Jim on October 22, 2007, 5:33 pm
 

    That is a quantity slightly smaller than the period at the end of this
sentence, IIRC. Actually, prolly a bit less. Hg sp.546



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