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 _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
