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Medical Forum / Diseases and Disorders / Lupus / November 2007

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As I Was About To Say . . .

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wrthomps@ix.netcom.com - 05 Nov 2007 11:00 GMT
. . . before Earthlink so rudely interrupted me with the
effable ineptness of its "service" . . .

I've tried out some LED bulbs over the past few months.  Far and
away the best is a 5 x 1 watt CREE LED.  It's about a bright as
a forty watt bulb and only uses 5 watts of power.  At $52.00
a pop it's pricey, but the costs should come down.  Even at
that price it's a better choice than stockpiling regular incandescent
bulbs.  It produces no UV and it's supposed to last 50 times
as long as an incandescent bulb.

I've also tried some "P60 48 white LED 110 V" bulbs,
which use three watts apiece and are rated at 150 lumens--about the
equivalent of a ten watt bulb. I've got a half dozen of them here, and
they're sort of like a Bush cabinet meeting: a very dim group.  They
might be okay in a small space, or if you need dim lighting in an
area, but you can't read by them.

Incidentaly, WalMart sells some LED nightlights for a dollar
or so apiece.  They use a half-watt of power and are about as
bright as a regular night light.  Plus they have a photocell to
turn them on when the regular lights go off.

Does anyone else have any experiene with LED bulbs?

--Bill Thompson
Ruth Tay - 05 Nov 2007 18:58 GMT
Thank you for your information.  I too have been investigating  LED
lighting.  My husband is an architect and there are lots of studies
appearing now, also further development of many more useful
sizes.  In about 8 months there is supposed to be new supplies
in the stores so  I am not stockpiling yet.  Thank you  for your
follow up  on the Walmart  nightlights.............ruth

> . . . before Earthlink so rudely interrupted me with the
> effable ineptness of its "service" . . .
[quoted text clipped - 3 lines]
> a forty watt bulb and only uses 5 watts of power.  At $52.00
> a pop it's pricey, but the costs should come down.  Even at

> that price it's a better choice than stockpiling regular incandescent
> bulbs.  It produces no UV and it's supposed to last 50 times
[quoted text clipped - 15 lines]
>
> --Bill Thompson
wrthomps@ix.netcom.com - 06 Nov 2007 08:42 GMT
>  "wrtho...@ix.netcom.com" <wrthomp...@gmail.com> wrote:

> > I've tried out some LED bulbs over the past few months.  Far and
> > away the best is a 5 x 1 watt CREE LED.  It's about a bright as
[quoted text clipped - 3 lines]
> > bulbs.  It produces no UV and it's supposed to last 50 times
> > as long as an incandescent bulb.

> > Does anyone else have any experience with LED bulbs?

> Thank you for your information.  I too have been investigating  LED
> lighting.  My husband is an architect and there are lots of studies
> appearing now, also further development of many more useful
> sizes.  In about 8 months there is supposed to be new supplies
> in the stores so  I am not stockpiling yet.

In the stores?  Great!  Have you heard anything about likely prices
and brightness when the bulbs appear in regular stores?

--Bill Thompson
Curtis R Anderson - 11 Nov 2007 02:26 GMT
> .. . . before Earthlink so rudely interrupted me with the
> effable ineptness of its "service" . . .
[quoted text clipped - 6 lines]
> bulbs.  It produces no UV and it's supposed to last 50 times
> as long as an incandescent bulb.

Cree Semiconductor has been making white LEDs for quite a while, over 15
years, I believe.

> I've also tried some "P60 48 white LED 110 V" bulbs,
> which use three watts apiece and are rated at 150 lumens--about the
[quoted text clipped - 9 lines]
>
> Does anyone else have any experiene with LED bulbs?

The "white" isn't very, I feel. It's like looking at a computer monitor
and calling that "white". I see the difference in shading like that.

I'll give credit where credit is due, though. Energy conversion to light
makes them cost effective. I would like one of those in my computer room
and use that instead of the still efficient flourescent 28W lamp I have
in the overhead fixture.

On the shop floor where I work, we have those high efficiency Philips
40W flourescent tubes, still full of UV, but whose spectrum is
sufficiently off-balance I see the green component in the lighting. That
goofs up my running touchup paint on our components scratched and
scuffed in handling, where the solvents are still fluorescing from the
UV present. I have to wait for the paint to dry a bit to see if my color
matched perfectly. It usually doesn't.

Sunlight is full spectrum, of course, and, unfortunately for those in
this group, UV is quite present.
Signature

Curtis R. Anderson, Co-creator of "Gleepy the Hen", still
"In Heaven there is no beer / That's why we drink it here ..."
http://www.gleepy.net/      mailto:gleepy@intelligencia.com
mailto:gleepy@gleepy.net (and others)  Yahoo!: gleepythehen

 
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