[RFI] Cree LED Light Bulb

[Jim Brown]

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