[ale] way OT amazing new LED flashlight technology

[Ron Frazier (ALE)]

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.
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>
>
>
>-- 
>David Tomaschik
>OpenPGP: 0x5DEA789B
>http://systemoverlord.com
>david at systemoverlord.com
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>http://mail.ale.org/mailman/listinfo


--

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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
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Ron Frazier
770-205-9422 (O)   Leave a message.
linuxdude AT techstarship.com
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