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From: Victor Roberts
Organization: Roberts Research & Consulting, Inc.
X-Mailer: Mozilla 4.78 [en] (Win98; U)
Subject: Re: luxeon star leds
References: <3DDD9A57.58900EFB@RobertsResearchInc.com> <email@example.com> <3DDDB646.96D0D9D2@RobertsResearchInc.com> <3DDE7264.CD48F4F8@RobertsResearchInc.com> <firstname.lastname@example.org> <3DDEB081.884EC92A@RobertsResearchInc.com> <3DE03D65.932BF9BF@RobertsResearchInc.com>
Date: Mon, 25 Nov 2002 19:37:16 GMT
NNTP-Posting-Date: Mon, 25 Nov 2002 11:37:16 PST
Tim Shoppa wrote:
> I certainly agree that convective cooling can be effective, but from
> an engineering standpoint you do it by first getting a good conductive heat
> sink/spreader and then using forced air if necessary.
You are certainly correct. However, this discussion started
as a way to explain some unexpected measurements posted by
another member of this list on a Luxeon LED that was not
connected to a heat sink. I do not believe that anyone in
this discussion ever suggested that these devices should be
run without heatsinks or that convective cooling could ever
be better than conduction from the base place of the Luxeon
to a good heat sink.
By the way, when I first applied power to one of these back
in June of 2001 it was not mounted on a heat sink. I was
holding the LED in my hand and can confirm that it got quite
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