Re: Floor-essent lamps for viewers

[P3D Gabriel Jacob <jacob@xxxxxxxxxxxxxx>]

John R. writes
>Unfortunately, "the glass does not transmit the UV" may be an 
>oversimplification in this case. The fact that regular glass would not
>be a good choice for a UV optical system doesn't necessarily mean that
>it blocks *all* the UV. You might be delighted if your pond liner retains
>95% of the water in your pond, but displeased if your roof lets 5% of the
>rainwater through. With the extreme proximity and brightness of the light
>source, and concerns regarding the role of UV in the development of
>cataracts, it's worthwhile to pay some attention to the details.

Very well put. I have always wondered about this aspect, regarding
the UV output of fluorescents, especially when I see my plastic
translucent cover on my kithcen under the cabinet lamp turn from white
to a funny yellow color after a few years. Since light tables also
include a similiar plastic cover, this would provide another layer of
protection. (no, I am not talking about the other kind of protection).


Now what I find funny, is the ban on mercury batteries. This is funny 
because just as many fluorescent bulbs (I think) were consumed and the
batteries probably had much less mercury than fluorescent lamps. Yes,
for those who are unaware of this, fluorescent lamps have mercury. 

On another related topic, how about the UV from halogen lamps? Heck it
seems the only alternative is to go back to the 50's style bulbs or
maybe even candddle power!

Gabriel safe and sound, in the dddark. 
 


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