Jeff, W3KI, shared some interesting perspective.
Others have noted that we often may have a CFL in much closer
proximity than a common florescent tube - so even if the CFL
UV level is similar the contact with our skin and eyes may be far
higher - thus those who may be unusually sensitive to UV may
be measurably impacted.
The same could be said for salt, for the average person a little or
a lot more salt merely makes one a little more thirsty, for others
it could make the difference to their metabolism that triggers a
negative reaction.
An interesting bit of detective work appears to be in order ...
> On Mon, Feb 23, 2009 at 9:49 PM, kd4e <doc@kd4e.com
> <mailto:doc@kd4e.com>> wrote:
>
> The claim of the researchers is 10x+ the UV radiation of a typical
> incandescent.
>
>
> Sure, I buy that.
>
> There's basically a vanishingly small amount of UV radiation in the
> thermal light distribution coming off an incandescent.
>
> Check out the Wikipedia graph of thermal emission spectra:
>
> http://en.wikipedia.org/wiki/File:Blackbody-lg.png
>
> Seems like a regular incandescent filament is about 3000-3200K, so
> it's like the red curve.
>
> There's going to be a little tiny bit of UV in that, but it's only
> strong in the visible and a LOT in the infrared! Of course, that
> means a lot of the energy goes into heating up the bulb and
> surroundings with IR emissions that don't give you any useful light
> output...
>
> So there's absolutely no question in my mind that a typical CFL gives
> off much more UV than an incandescent. CFL's need to generate UV to
> work, incandescents just have a little tiny bit out on the high end of
> the emission spectrum.
>
> That doesn't necessarily mean a CFL gives off a dangerous amount.
> After all, wouldn't much matter if I was saying 10 grains of salt have
> 10x the sodium of 1 grain of salt :-)
>
> 73
> Dan
>
--
Thanks! & 73, doc, KD4E
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