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- Xref: sparky misc.consumers:15721 sci.energy:4143 sci.environment:10899 sci.med:16470 sci.physics:13651 talk.environment:3417
- Newsgroups: misc.consumers,sci.energy,sci.environment,sci.med,sci.physics,talk.environment
- Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!xn.ll.mit.edu!ll.mit.edu!ryba
- From: ryba@ll.mit.edu (Marty Ryba)
- Subject: Re: Are Your Light Bulbs Radioactive?
- Message-ID: <1992Aug26.194818.5380@ll.mit.edu>
- Originator: ryba@ll.mit.edu (Marty Ryba)
- Sender: news@ll.mit.edu
- Reply-To: ryba@ll.mit.edu (Marty Ryba)
- Organization: Group 101, MIT Lincoln Lab.
- References: <1992Aug25.150127.9229@engage.pko.dec.com> <1992Aug25.224138.12479@mcnc.org> <1992Aug26.003354.27179@kestrel.edu>
- Date: Wed, 26 Aug 92 19:48:18 GMT
- Lines: 29
-
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- In article <1992Aug26.003354.27179@kestrel.edu>, king@reasoning.com (Dick King) writes:
- |> In article <1992Aug25.224138.12479@mcnc.org> ekp@mcnc.org (Edward Pavelchek) writes:
- |> >Does this mean that fluorescent bulbs no longer use Be compounds?
- |> >
- |>
- |> They don't, but not because of Promethium.
- |>
- |> Promethium is used to make the bulbs' arc start more easily.
- |>
- |> Beryllium[sp?] was once used as part of the flourescent powder. This
- |> practice was stopped when we realized how dangerous it was and when we found
- |> substitutes. Beryllium salts cause some sort of permanent lung damage. They
- |> haven't used Beryllium in flourescents for decades.
- |>
- |> -dk
-
- Fluorescent lamps I used to work with all use Barium compounds in the
- material on the cathodes to stimulate emission of the electrons needed for
- sustaining the arc. I'm not sure of the toxicity of various Barium organic
- salts, but we didn't follow any special precautions in the engineering lab.
-
- Just my $.02
-
- --
- Dr. Marty Ryba | Generation X:
- Group 101 - Radars 'R Us |
- MIT Lincoln Laboratory | Too young to be cynical,
- ryba@ll.mit.edu | too old to be optimistic.
-