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

[Paul King]

2. RE: Eco bulbs: Phys-teach-talk Digest, Vol 8, Issue 6
    (Paul King)

With respect to the economics of moving to Eco-bulbs. The small capital cost
involved with such a switch is repaid with interest within 6 months of
installation, and over the lifetime of an eco bulb (20 W) savings amount to
about $75 at least. This is electricity not generated, gas not ignited. It
is a genuine, major cost saving as well a huge energy efficiency boost. Now
to apply the same effort to getting insulation retrofitted.

A small saving not commonly discussed is the extended life the new bulbs
give to our light fittings. The reduced heat seems to slow the powdering of
our plastic fitments. The heat induced decay of fitments has probably been
the cause of as many fires as failing ballasts are ever likely to produce.

You can hear that I am a convert to Eco-bulbs and so shouldn't be trusted to
provide a balanced view in any debate - but we have a bright life and LOW
power bills - that much is real.

And in the early 60's my wife's unattended science class snitched some
mercury. Apparently the whole class put drops in their mouths where the
slithering cool in the groves of the  tongue produced weirdly sensual
sensations! There was no outbreak of mercury poisoning and she remains
extraordinarily clever.
Paul King
 
On 17/8/08 4:00 AM, "phys-teach-talk-request at nzip.org.nz"
<phys-teach-talk-request at nzip.org.nz> wrote:

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>    1. RE: Eco bulbs: Phys-teach-talk Digest, Vol 8, Issue 6
>       (Jonathan Jaffrey)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Sat, 16 Aug 2008 11:33:15 +1200
> From: "Jonathan Jaffrey" <jjaffrey at slingshot.co.nz>
> Subject: RE: Eco bulbs: Phys-teach-talk Digest, Vol 8, Issue 6
> To: <phys-teach-talk at nzip.org.nz>
> Message-ID: <849D1425F6644533A8994509C160066A at handjstudy>
> Content-Type: text/plain; charset="us-ascii"
> 
> 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
> 
> -----Original Message-----
> From: phys-teach-talk-bounces at nzip.org.nz
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> Today's Topics:
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>    1. Re: Long life light bulbs (John Bennet)
>    2. Re: Safety of eco bulbs (John Watson)
> 
> 
> ----------------------------------------------------------------------
> 
> 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
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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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