[Elecraft] Re: FCC rules part 18 [CF bulbs vs. LED]

[Leigh L Klotz, Jr.]

Here is a link to a presentation by the CEO of Lumileds, maker of the
Luxeon LEDs you see in those flashlights for sale at hamfests.  I attended
a presentation of this talk and got to ask some questions about warm-white
lighting, but apparently the video feed of the talk is not available.

"LEDs for Solid State Lighting and Other Emerging Applications: Status,
Trends, and Challenges"
M. George Craford
LumiLeds Lighting

<http://www.ewh.ieee.org/r6/scv/eds/slides/20051213-George-Craford-Lumileds.pdf
>
The beginning is good, but slides 14-28 are skippable; after that the
technical content picks up again.  In particular, slide 31 shows the
target efficiencies and costs needed to compete with CF, and later slides
show the technical challenges and possible avenues for remedying them.

This talk is now a couple of years old, so one hopes advances have been
made.  I see 100 lm/w LEDs for sale now, but not in the warm white (3300K)
range, only "daylight" (5000K) and up, and single colors.

The conclusion of this talk is that general-purpose LED lighting will
happen, but the timing is hard to predict.  It is possible that the push
to legislate use of CF is an attempt by the CF industry to cement their
use before LED lighting reaches this stage.

73,
Leigh/WA5ZNU