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Posted by Edgar on April 30, 2007, 2:06 pm
>
> [ snip ]
>>
>> Interesting, my stupid web is down (yet I can email and use
>> newsgroups, go figure) so I'll check the links later. Do incandescent
>> actually deliver Vitamin D the way the sun does?
>
> As I mentioned in another post, *IIRC*, it is the near-UV that stimulated
> the skin to produce Vitamin D. Incandescents are red-shifted,
> fluorescents
> tend to be blue-shifted (i.e., more near-UV).
>
>
>> I never realized but
>> that might explain a lot about how peoples health are affected by
>> their workplace.
>
> The problem with unshielded fluorescents is that they are harder on the
> eyes. Something to do with the shorter wavelengths - I've forgotten the
> details. OTOH, who hangs bare incandescents around? If one wouldn't use
> bare incandescents, then it makes little sense to expect that bare
> fluorescents are going to be easier on people's eyes. Those plastic
> sheets
> with the little pyramid-shapes all over aren't any good, either. The
> full-
> spectrum and the "warm whites" might be OK, but not the average ones.
>
> But a simple sheet of beige-toned thin paper, even tissue paper, usually
> makes an adequate filter that doesn't reduce the light much at all.
>
>
>> Do you guys remember a little while back there was
>> all this stuff about air quality inside of offices and how it was
>> affecting health and stress levels. I wondered if they ever
>> considered this factor in those types of studies.
>
> The fumes from manufactured materials is a completely different issue from
> lighting. The fumes will cause irritation of nmoist/mucous-membrane
> tissues regardless of lighting, and bad lighting will cause eyestrain
> redgardless of whether fumes are present or absent. Both have been
> studied, of course - but that doesn't mean that budgets will put human
> comfort at the top of the "important stuff" list. Of course it is stupid,
> because miserable employees are inefficient employees, but that
> realization
> takes a modicum of forethought, which is a rare commodity...
>
>
>> I for one am all for these new technologies, but with lots of
>> research. I like the idea of hybrids, but it still bothers me the
>> amount of destruction that is caused just getting the nickel to make
>> their batteries (among other components). I never really understood
>> the technology and raw materials that go into solar panels, another
>> thing I would like to look into.
>>
>> It's pretty crazy to think that the light bulb was a pretty amazing
>> invention that changed a lot of lives, and now it is going the way of
>> the dodo. Life goes on :).
>>
>
> Wrong, it is not going the way of the dodo, it is more liek the Galapagos
> Finches - it's unlikely that there are any of th e"pure" ancestral finches
> left, because the rigors of the habitats have forced the development of
> specialized subspecies.
>
> IOW, not extinction - evolution.
>
> - Kris
Yes of course...that's what I meant to say :).
--
Edgar
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