On 8/11/2014 Jim Brown wrote:
> 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.
Thank You
> 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.
Very true - BUT My assumption was that if you had an enclosure rated
for 60W incandescent, AND a LED rated for enclosed fixtures, running
the "60 watt equivalent" (or for that matter, a '75 watt equivalent')
in the fixture is most likely NOT going to be an issue, in that for
all intents, watts drawn = heat
> 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
--
73 de KG2V - Charles Gallo
Quality Custom Machine-shop work for the radio amateur (sm)
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