<html><head/><body><html><head></head><body>that's no moon, er flashlight, that's a space station.<br>
<br>
you'd probably get blinded by the reflection from a white wall. maybe you could use it in place of an overhead fixture in your house. looks pretty cool.<br>
<br>
Ron<br>
<br><br><div class="gmail_quote">David Tomaschik <david@systemoverlord.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<pre style="white-space: pre-wrap; word-wrap:break-word; font-family: sans-serif; margin-top: 0px">This is the flashlight you want:<br /><a href="http://elektrolumens.com/FireSword/FireSword-IV.html">http://elektrolumens.com/FireSword/FireSword-IV.html</a><br /><br />A power outage will suddenly become a sunny day at the beach!<br /><br />David<br /><br /><br />On Tue, Sep 18, 2012 at 8:09 PM, Alex Carver <agcarver+ale@acarver.net> wrote:<br /><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">On 9/17/2012 21:16, Ron Frazier (ALE) wrote:<br /><blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #ad7fa8; padding-left: 1ex;">I bought the Nebo 5610 220 Lumen Redline Tactical at Batteries Plus. This unit costs about $30. They warrant the unit for life. It has a very bright LED emitter called a Cree. I haven't done research into the merits of this, but it IS very bright.</blockquote><br />Cree isn't a type of LED, it's the name of a major manufacturer of LEDs<br />and other devices (the other major manufacturer is Philips Lumileds<br />which makes the Luxeon brand of emitters). Cree is based out of North<br />Carolina and their primary area of expertise is in silicon carbide (SiC)<br />based devices (of which certain types of blue and ultraviolet LEDs are<br />made). The LED in your flashlight is one of their UV models (probably<br />an XLamp if it's a recently designed flashlight) down-converted to white<br />using phosphor coatings (look closely at the LED (with the power off of<br />course!) and you should see a pale yellow dot in the center -- that's<br />the phosphor bead). This UV-phosphor design is currently the most<br />common white LED.<br /><br />Cree's emitter gets its big power because SiC can handle very high<br />temperatures without degrading but it does require a flashlight that is<br />built properly to support a large LED like that. SiC LEDs can pump out<br />many watts of heat into their heatsinks. Junction temperatures (the<br />temperature at the diode chip inside) can reach over 150 degrees Celsius.<br /><br />Cheaper flashlights or replacement modules use lower power LEDs because<br />of the heatsink requirement. They either don't have any heat sinking to<br />keep manufacturing costs and retail price low or, in the case of the<br />replacement modules, the flashlight doesn't have the proper design for<br />keeping the diode cool since it was an incandescent bulb originally.<br /><br />Enjoy the flashlights. :) LEDs have made some nice progress in the<br />last few years. I've got the LED Maglite (made with an LED from the<br />start that also does the SOS flashing), and several LED desk/task lamps<br />that work quite well.<br /><hr /><br />Ale mailing list<br />Ale@ale.org<br /><a href="http://mail.ale.org/mailman/listinfo/ale">http://mail.ale.org/mailman/listinfo/ale</a><br />See JOBS, ANNOUNCE and SCHOOLS lists at<br /><a href="http://mail.ale.org/mailman/listinfo">http://mail.ale.org/mailman/listinfo</a></blockquote><br /><br /></pre></blockquote></div><br>
<br>
--<br>
<br>
Sent from my Android Acer A500 tablet with bluetooth keyboard and K-9 Mail.<br>
Please excuse my potential brevity.<br>
<br>
(To whom it may concern. My email address has changed. Replying to former<br>
messages prior to 03/31/12 with my personal address will go to the wrong<br>
address. Please send all personal correspondence to the new address.)<br>
<br>
(PS - If you email me and don't get a quick response, you might want to<br>
call on the phone. I get about 300 emails per day from alternate energy<br>
mailing lists and such. I don't always see new email messages very quickly.)<br>
<br>
Ron Frazier<br>
770-205-9422 (O) Leave a message.<br>
linuxdude AT <a href="http://techstarship.com">techstarship.com</a><br>
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