Eco bulbs: Phys-teach-talk Digest, Vol 8, Issue 6

[Jonathan Jaffrey]

Hmmm
The integrated ballast in these bulbs could well fail occasionally as with
any electronics (TVs etc). Halogen bulbs also fail at high temps & have been
linked to house fires. The volumes of mercury are likely to be
insignificant. To return to Kerry's point - surely a balanced take on this
would be that it'd be better to spend money on insulating homes & hot water
supplies than putting all this capital expense into reducing lighting
costs??
Jonathan Jaffrey

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Today's Topics:

   1. Re: Long life light bulbs (John Bennet)
   2. Re: Safety of eco bulbs (John Watson)


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Message: 1
Date: Fri, 15 Aug 2008 08:31:25 +1200
From: John Bennet <johnb at delasalle.co.nz>
Subject: Re: Long life light bulbs
To: Phys-teach-talk at nzip.org.nz
Message-ID: <48A4961D.6010104 at delasalle.co.nz>
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Message: 2
Date: Fri, 15 Aug 2008 08:46:59 +1200
From: "John Watson" <jwatson at stbedes.school.nz>
Subject: Re: Safety of eco bulbs
To: <phys-teach-talk at nzip.org.nz>
Message-ID: <001701c8fe4e$e5e28130$4b97a8c0 at stbedes.school.nz>
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I don't read Investigate, but there is an article on the Stuff website
regarding eco bulb safety.
"The Government's safety agency has warned the Fire Service about the
potential hazard of energy-saving lightbulbs, a memorandum to firefighters
reveals.


The memo, of which The Dominion Post has a copy, warns that compact
fluorescent lamps, or eco bulbs, are reported to be melting, blowing up and
blackening surrounding electrical equipment."

John Watson
St Bede's College

> Date: Thu, 14 Aug 2008 16:55:53 +1200
> From: "g.foster" <g.foster at clear.net.nz>
> Subject: Long life light bulbs
> To: Phys-teach-talk at nzip.org.nz
> Message-ID: <48a3bad9.1e2.20d9.28026 at clear.net.nz>
> 
> In the recent Investigate magazine Ian Wishhart has an
> article re how DANGEROUS the new coiled light bulbs are. Has
> anyone else read it?? Any comments? 
> 
> If you would like a copy please email me  fs at eggs.school.nz
> 
> Graham Foster
> 
> Graham Foster
> Director of Science, EGGS
> AMI Learned Society
> 
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Thu, 14 Aug 2008 18:59:23 +1200
> From: Kerry Parker and Andy Price <parkerprice at clear.net.nz>
> Subject: Re: Long life light bulbs
> To: g.foster at clear.net.nz, Phys-teach-talk at nzip.org.nz
> Message-ID: <1416D1A702B84AFA99BD5ACF48D7BB98 at study>
> Content-Type: text/plain; format=flowed; charset=iso-8859-1;
> reply-type=original
> 
> Thanks Graham.  The article looks like an excellent example of unbalanced,

> biased reporting, high on SENSATIONALISM.  Yes, the use of capitals is 
> UNNCESCCESARY!!!  It is good to question these things.  It is sad that the

> word 'investigate' is associated with this type of journalism.  I belive 
> quite passionately that we should be teaching our students to see through 
> scare-mongering flakey 'science' and make reasoned decisions, as adults, 
> based consideration of a range of evidence of varying validity.  Whether
it 
> is Moon hoaxes, the oil companies supressing the water-powered car, cell 
> phones as mind-control or food supplements , we all need to get things in 
> proportion and make up our own minds.
> Discussion of relative risk and what might be deemed dangerous, or even 
> DANGEROUS, is also valueable.  The evidence that I have seen is that
people, 
> with Kiwis in particlar, being pretty poor at assessing relative risk.
> Happy debating
> Kerry
> 
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End of Phys-teach-talk Digest, Vol 8, Issue 6
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