LEDs bad? [RE-wrenches]

[Peter Parrish]

LEDs may represent one of the most significant electronic technologies that
we have seen in the past 50 years. No exaggeration.

First they are capable of being used in both the illumination as well as
indication markets. There _is_ a difference: think of the difference between
a head light vs a tail light.

Second, they are among the most efficient light sources known (watts in vs
lumens out), and this includes CFLs.

Third, they come in a variety of colors, red, amber, green, blue, violet as
well as cool and warm white.

Fourth, because they have very short time constants, they can be strobed for
even higher effective efficiency.

Fifth, they have truly mind boggling lifetimes, tens of years

Sixth, being solid states devices, they are much more rugged than CFLs and
of course incandescents.

Pay attention to the occasional "bad news" of course (rust from the inside
out?!), but LEDs are simply going to take over virtually every indication
and illumination market there is on the planet.

It will be fun to watch each illumination and indication application: your
entire car/truck/boat/plane, every home appliance, all industrial and
residential lighting, flashlights, LCD screen backlighting, and perhaps
eventually stadium flood lights captured by LEDs.

It might be as much fun as watching integrated circuits make their
inexorable into every computation and automation function in our lives.

- Peter

Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com 

-----Original Message-----
From: Joel Davidson [mailto:joel.davidson at sbcglobal.net] 
Sent: Monday, December 17, 2007 6:02 PM
To: RE-wrenches at topica.com
Subject: [Norton AntiSpam] LEDs bad? [RE-wrenches]


Wrenches,
Any truth to report that LEDs rust from the inside out and do not have 
long-life warranties? See EETimes commentary about LEDs replacing 
incandescent Christmas lights at 
http://www.eetimes.com/rss/showArticle.jhtml?articleID=204702684&cid=RSSfeed
_eetimes_newsRSS
Joel Davidson 


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