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From: email@example.com (Bob Wilson)
Subject: Re: luxeon star leds
Date: Wed, 27 Nov 2002 05:05:10 -0000
Organization: Your Organization
X-Newsreader: WinVN 0.99.9 (Released Version) (x86 32bit)
References: <3DDD9A57.58900EFB@RobertsResearchInc.com> <firstname.lastname@example.org> <3DDDB646.96D0D9D2@RobertsResearchInc.com> <3DDE7264.CD48F4F8@RobertsResearchInc.com> <email@example.com> <3DDEB081.884EC92A@RobertsResearchInc.com> <3DE03D65.932BF9BF@RobertsResearchInc.com> <3DE15871.EF8FF9EA@RobertsResearchInc.com> <3DE224D3.81EFBA3C@RobertsResearchInc.com>
In article , firstname.lastname@example.org says...
>In article , Watson 'Atto
>Parsec' Name wrote:
>>The Luxeon has a _built-in_ heatsink. Somewhere I read that it stabilizes
>>at 60 deg without any external HS.
> The "stars", but not the "emitters", have heatsinks which are intended
>to be partial. Ability to work properly at full power without
>*additional* heatsinking seems to me to be a maybe with the 1 watt ones
>and is definitely not even close with the 5 watt ones. The 5-watters
>with heatsinks absolutely require additional heatsinking if you put more
>than a watt or two into them.
> The "emitters" have no heatsinking at all and require heatsinking.
> - Don Klipstein (email@example.com)
So do the 1 Watt devices. This is especially true if you want maximum
brightness out of them. Light output drops substantially at elevated
temperatures, as does life. Again, Lumileds has published substantial data
on this (on their website).
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