LEDs bad? [RE-wrenches]

Travis Creswell tcreswell at ozarkenergyservices.com
Tue Dec 18 09:12:35 PST 2007


We are just now getting our hands on commercial specification grade LED
fixtures.  The national rep for what appears to be a top of line product
recently visited us and we were impressed much more so then I thought we
would be.  I'm definitely from the Show-Me state.

One particularly impressive product was the 12 watt LED fixture (assembly
might be a better description) that is a replacement for 65 watt PAR type
lamps.  The Color (2700 Kelvin) and CRI (92) was absolutely
indistinguishable from incandescent.  I was totally surprised.  Retails for
~$130 they told me.  Dimmable too!

www.LLfinc.com is the manufacturer's website.  Apparently it's very
important to properly heat sink LED's.  They do rate them at 50k hrs as
that's when light output begins to quickly decline. I'm not totally clear
about the details of that as we didn't get to finish that discussion.  The
rep was heading off to catch a flight to DC to install these lights in Al
Gore's office.

*CRI = Color rendering index.  Most compact fluorescents are in the mid 70's
and the better fluorescent tubes are in the mid 80's.  Incandescent/Sunlight
is the benchmark for CRI @ 100.

Travis Creswell
Ozark Energy Services


-----Original Message-----
From: Don Loweburg [mailto:i2p at aol.com] 
Sent: Tuesday, December 18, 2007 10:45 AM
To: RE-wrenches at topica.com
Subject: Re: LEDs bad? [RE-wrenches]



 
In a message dated 12/17/2007 6:08:36 P.M. Pacific Standard Time,  
joel.davidson at sbcglobal.net writes:

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 





Article impugns the cheapo led strings on the consumer market. Not  good
for 
led tech generally but in my mind does not address the  many other led apps 
developing. The article sounds like a smear  piece masquerading as a tech 
review.
 
Don L



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