[ale] way OT amazing new LED flashlight technology

[Scott Castaline]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Also they're a bit pricey, $129.00 for the smallest one and $1499.00
for the Search and Rescue. I do have to admit the one called Kong
could also double up as a 2nd weapon. That thing looks like it would
give a potential attacker a serious headache after being blinded and
whacked on the head with it.


On 09/19/2012 07:15 PM, Ron Frazier (ALE) wrote:
> that's no moon, er flashlight, that's a space station.
> 
> 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.
> 
> Ron
> 
> 
> David Tomaschik <david at systemoverlord.com> wrote:
> 
> This is the flashlight you want: 
> http://elektrolumens.com/FireSword/FireSword-IV.html
> 
> A power outage will suddenly become a sunny day at the beach!
> 
> David
> 
> 
> On Tue, Sep 18, 2012 at 8:09 PM, Alex Carver
> <agcarver+ale at acarver.net> wrote:
> 
> On 9/17/2012 21:16, Ron Frazier (ALE) wrote:
> 
> 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.
> 
> 
> Cree isn't a type of LED, it's the name of a major manufacturer of
> LEDs and other devices (the other major manufacturer is Philips
> Lumileds which makes the Luxeon brand of emitters). Cree is based
> out of North Carolina and their primary area of expertise is in
> silicon carbide (SiC) based devices (of which certain types of blue
> and ultraviolet LEDs are made). The LED in your flashlight is one
> of their UV models (probably an XLamp if it's a recently designed
> flashlight) down-converted to white using phosphor coatings (look
> closely at the LED (with the power off of course!) and you should
> see a pale yellow dot in the center -- that's the phosphor bead).
> This UV-phosphor design is currently the most common white LED.
> 
> Cree's emitter gets its big power because SiC can handle very high 
> temperatures without degrading but it does require a flashlight 
> that is built properly to support a large LED like that. SiC LEDs
> can pump out many watts of heat into their heatsinks. Junction
> temperatures (the temperature at the diode chip inside) can reach
> over 150 degrees Celsius.
> 
> Cheaper flashlights or replacement modules use lower power LEDs 
> because of the heatsink requirement. They either don't have any
> heat sinking to keep manufacturing costs and retail price low or,
> in the case of the replacement modules, the flashlight doesn't have
> the proper design for keeping the diode cool since it was an
> incandescent bulb originally.
> 
> Enjoy the flashlights. :) LEDs have made some nice progress in the 
> last few years. I've got the LED Maglite (made with an LED from
> the start that also does the SOS flashing), and several LED 
> desk/task lamps that work quite well. 
> ------------------------------------------------------------------------
>
>  Ale mailing list Ale at ale.org 
> http://mail.ale.org/mailman/listinfo/ale See JOBS, ANNOUNCE and
> SCHOOLS lists at http://mail.ale.org/mailman/listinfo
> 
> 
> 
> 
> 
> --
> 
> Sent from my Android Acer A500 tablet with bluetooth keyboard and
> K-9 Mail. Please excuse my potential brevity.
> 
> (To whom it may concern. My email address has changed. Replying to
> former messages prior to 03/31/12 with my personal address will go
> to the wrong address. Please send all personal correspondence to
> the new address.)
> 
> (PS - If you email me and don't get a quick response, you might
> want to call on the phone. I get about 300 emails per day from
> alternate energy mailing lists and such. I don't always see new
> email messages very quickly.)
> 
> Ron Frazier 770-205-9422 (O) Leave a message. linuxdude AT
> techstarship.com <http://techstarship.com>
> 
> 
> _______________________________________________ Ale mailing list 
> Ale at ale.org http://mail.ale.org/mailman/listinfo/ale See JOBS,
> ANNOUNCE and SCHOOLS lists at http://mail.ale.org/mailman/listinfo
> 

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/
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=Taap
-----END PGP SIGNATURE-----