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Re: [RFI] Cree LED Light Bulb

To: rfi@contesting.com
Subject: Re: [RFI] Cree LED Light Bulb
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Mon, 11 Aug 2014 11:38:56 -0700
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
On 8/11/2014 11:05 AM, Charlie Gallo wrote:
Again,  you're  looking  at  1.17  watts of light, and therefore 12.83
watts as heat

All good analysis, quite sufficient as far as fire hazard is concerned. But there's another issue -- that 13W of heat has to go somewhere, and depending on the enclosure, some or all may stay within the enclosure and raises its ambient. That may, or may not, allow sufficient conduction of heat away from the circuitry to prevent destructive failure of the lamp and/or its circuitry.

Something like 5-6 years ago, I bought a couple of Edison-base multi-LED lamp assemblies from a hamfest vendor, and stuck them in a simple reflector fixture (one-third spherical, thus 2/3 open) as lighting in the shack. Within a month or two, both lamp assemblies had developed cracks in the glass.

73, Jim K9YC

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