Re: LED lighting

[Mike Barnes <march2006@xxxxxxxxxxxxxxxxxxxxxx>]

In comp.home.automation, AZ Nomad wrote:
>On Sun, 05 Mar 2006 13:43:47 -0800, Jim Baber <jim@xxxxxxxxx> wrote:
>
>
>>Jim Baber writes:
>>They are quite expensive, but seem to be base common to regular
>>incandescent and compact fluorescent bulbs.
>
>>I would wait there are other goodies in the pipeline, One is a new
>>derivation on the LED that uses a LED to excite other diodes on the
>>inner surface of a bulb that reportedly gives the same lumen output as a
>>standard 60 W incandescent does with only 1.0 W of input power at
>>115VAC.  That is much better than CFL or regular LED, but still in
>>development
>
>I find that hard to believe.  Are you saying that incandescent's
>are less than 0.016% efficient (assuming that your superduper LED
>is 100% efficient)?

I think you're a factor of 100 out, and that the figures imply an
efficiency of less than 1.6%, not 0.016%. That does seem low, but
not ridiculously low, e.g. Wikipedia states 1.9% for a 40W bulb
(<http://en.wikipedia.org/wiki/Incandescent_light_bulb>).

--
Mike Barnes