Re: HID and MH lamps are absent from interior lighting!

Chris Carlen wrote:
> Hi:
>
>
> Every once in a while I get interested in HID and metal-halide (MH)
> lighting systems. My recent spurt of interest was triggered by the
> possiblity that I might get to acquire a xenon short-arc lamp for my
> job. Oh will that be fun! But I have learned that there is almost no
> way that xenon short arcs to be attractive for consumer lighting. They
> aren't even particularly efficient. Just have the closest
> approximation to a white light point source.
>

Lets compare: a halogen front light in cars uses 55W and produces 1550lm,
which is 28 lm/W
a HID mercury lamp for the same application has 43W(with ballast) and is
good for 3000lm, which is almost 70lm/W. Why do you think this isn't
particulary efficient? (Source Osram)

> But I have often wanted to get my paws on a miniature HID (automobile
> or smaller size) for portable or task/desk lighting use.
>
> Yesterday I discovered this:
>
> http://www.walamp.com/lpd/lamptype/index.tpl?LTSKU=12413818101355&cart=1126201406819984
>
> The I found a portable dive light employing the 10W Solarc device very
> reasonably priced compared to the component prices from WelchAllen:
>
> http://www.uwkinetics.com/D_LC100.htm
>
> This is truly the coolest flashlight I have ever seen. A must have!
>
> But I am surprized at the lack of small HID or MH lamp fixtures for
> interior lighting.
>
> I will continue looking for a small HID/MH desk lamp or table lamp, or
> other interior fixture.
>
> Heh, heh, when I was a kid I came across both a 50W HP sodium and a
> 175W mercury vapor lamp fixture. I took them apart and then used to
> run them completely open. That is, no enclosure around the ballast
> transformers; the Hg lamp would stand up on its own on a table on the
> ballast core, and the Na lamp I put into a ceramic wall mount socket
> a few inches from the ballast that I could station somewhere on top
> of a bookcase.
> Man did those things light up the room! And the combined Na+Hg made
> for a decent color balance.
>

Hopefully the UV radiation at 234nm has not damaged your eyes when running
the lamp without glass filter.

--
ciao Ban
Bordighera, Italy


.

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