[NewCandle] New high efficiency LED

[Keith Nagel]

Thanks, Horace. We were all puzzling over the LED efficiency
question when Ron was promoting his RF LED device. I can't
help but imagine that someone has written the end-of-all study
on the subject, if one were inclined to scour the literature.

Pulsing certainly helps; I have seen this used to extend battery
life as the eye can't discern the fast pulsing from DC and
you can effectively get more light from the LED for a given
power input.

The comment thread at the end of your link made me chuckle;
such trolling at Physorg!

K.

-----Original Message-----
From: newcandle-bounces at ipdiscover.com
[mailto:newcandle-bounces at ipdiscover.com]On Behalf Of Horace Heffner
Sent: Monday, January 12, 2009 4:29 PM
To: New energy for the new world.
Subject: [NewCandle] New high efficiency LED



http://www.physorg.com/news151003742.html

http://tinyurl.com/a3d9jz

"The new device achieves a notable reduction in “efficiency droop,” a
well-known phenomenon that provokes LEDs to be most efficient when
receiving low-density currents of electricity, but then to lose
efficiency as higher density currents of electricity are fed into the
device. The cause of this droop is not yet fully understood, but
studies have shown that electron leakage is likely a large part of
the problem."

Makes me think operating with pulsed DC of short enough duration
might also avoid the droop.

Best regards,

Horace Heffner
http://www.mtaonline.net/~hheffner/





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