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Re: [RFI] Cree LED Light Bulb

To: "rfi@contesting.com" <rfi@contesting.com>
Subject: Re: [RFI] Cree LED Light Bulb
From: Kim Elmore <cw_de_n5op@sbcglobal.net>
Date: Mon, 11 Aug 2014 12:09:47 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
The 90 W-equivalent flood I got is rated at 1500 lumens and consumes 18W. If 
all of that 18 W is dissipated as heat (unlike an incandescent, it isn't), the 
can enclosure is being operated at 30% of its rated heat load. I can't help but 
think that's relatively safe. 

Kim N5OP

"People that make music together cannot be enemies, at least as long as the 
music lasts." -- Paul Hindemith

> On Aug 11, 2014, at 11:39, Peter Laws <plaws0@gmail.com> wrote:
>> On Mon, Aug 11, 2014 at 10:25 AM, Kim Elmore <cw_de_n5op@sbcglobal.net> 
>> wrote:
>> That's interesting as in their on-line FAQ, Cree says they approve of 
>> installation in can fixtures. We've had 42 W CFLs in there for the last 8 
>> years and never seen evidence of overheating. However, the light is cycled a 
>> lot and I suspect the failures we've seen are related to that. Cree again 
>> states that power cycling is harmless to their LED bulb. I guess I'll get to 
>> find out!
> Lumens, gentlemen, please!  IMHO, bulbs should also receive a rating
> based on how much heat they generate.  Clearly, there is a difference
> in the heat output of an Edison bulb that consumes 60 W of power and a
> CFL that puts out the equivalent light (at considerably less power
> consumption).
> I've got a CFL in my bathroom can fixture (bathroom?  can?  hmm) and
> never had a problem.  In fact, until just now, I've never given it a
> thought.  As best I can remember, we installed it 8 years ago when we
> moved in and have never changed it.
> I neither know the lumens nor how much power it consumes let alone how
> many Joules of heat it generates.
> -- 
> Peter Laws | N5UWY | plaws plaws net | Travel by Train!
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