Re: Flashlights - another one Reply #25 – December 28, 2011, 11:05:16 am Yahoo Message Number: 127528Frank,You say you 'need brightness', but how bright do you need? Being somewhat of a LED flashlight connoisseur, my house and shop are littered with little lights. The advances in LED technology have been spectacular, now having passed 70 lumens per watt which makes LEDs suitable for use as aircraft landing lights and more. I just installed 4 such lights on my Husky ' www.aeroleds.com 'sunspot 36 LX', a huge improvement over incandescent, quartz halogen, and HID, I've done comparison tests. How does this relate to little flashlights? In order to get 'brightness' projected out there where it's needed, better measured in lumens rather than candela, you need to power the LEDs and this means current. Comparatively speaking, not much current is available from the AAA or AA batteries that power the inexpensive little LED lights. 'Truly bright' as in 'Holy bananas that's bright!', starts happening when you can drive the more modern LEDs with 1 to 3 amps. Powered by two 18650 or four CR123 batteries, the Fenix TK-35 projects a brighter beam than many car headlights, it's almost like holding a little bit of the sun in your hand. You cannot look into the light directly without being badly blinded. The light could be used as a disorienting 'weapon' on an intruder at night - - it's that bright. In fact, you have to use it on lower power settings if you are using it as a work light. Shining it on a sheet of white paper at arms length while on high power is uncomfortable even in daylight. Bottom line, if you are talking 'bright', there is no comparison between the ten dollar flashlights and the one costing a hundred dollar . . . literally night and day. Sort of light camping in a tent compared to roughing it in an LD!bumper[Non-text portions of this message have been removed]
Re: Flashlights - another one Reply #26 – December 28, 2011, 11:37:41 am Yahoo Message Number: 127529bumper,I can appreciate that a flashlight connoisseur would want a bright LED, even if it costs more than good whisky. Besides using a hand held BRIGHT LED to disorient bad guys and getting your three doors down neighbor's cat to "catch" the light on the side of their house what, pray tell, are other practical uses?Cheers, Don
Re: Flashlights - another one Reply #27 – December 28, 2011, 12:13:25 pm Yahoo Message Number: 127530wrote: The advances in LED technology have been spectacular, now having passed 70 lumens per watt which makes LEDs suitable for use as aircraft landing lights and more. ....Powered by two 18650 or four CR123 batteries, the Fenix TK-35 projects a brighter beam than many car headlights, it�s almost like holding a little bit of the sun in your hand. You cannot look into the light directly without being badly blinded. The light could be used as a disorienting �weapon� on an intruder at night - - it�s that bright. --- According to the specs (and photos) in the link below, the Fenix TK 35 can produce *820* lumens! That's a real retina-burner! ;-) http://www.fenixlight.com/viewnproduct.asp?id=86 Joan
Re: Flashlights (off topic) Reply #28 – December 28, 2011, 02:46:19 pm Yahoo Message Number: 127534QuoteFrom where I come from: all metal still conducts electricity, Thing is, technically that anodized surface may feel like a metal - but it is not. It is an oxide, and like most other oxides (e.g. glass) it is classified as an insulator. Matter of fact, aluminum oxidizes rather easily, which is one reason it is a problem when used in electrical wiring. As it oxidizes, it develops resistance, which leads to heating, which leads to more resistance, more heating, then fire...Steve
Re: Flashlights - another one Reply #29 – December 29, 2011, 01:32:46 pm Yahoo Message Number: 127545Don, Being also a cheeseburger connoisseur, in a pinch the TK 35 comes in handy as a food warmer. It may also thaw pipes, remove paint, and plasma-weld sheet metal - - none of the aforementioned has been university tested. But is does have a mondo-gnarly strobe and SOS mode if you find yourself adrift at sea in a small rubber raft and need to signal a distant PBY.bumper[Non-text portions of this message have been removed]
Re: Flashlights - another one Reply #30 – December 29, 2011, 03:59:23 pm Yahoo Message Number: 127547Sometimes you get what you want. And you rose to the occasion. ThanksQuoteBeing also a cheeseburger connoisseur, in a pinch the TK 35 comes in handy as a food warmer. It may also thaw pipes, remove paint, and plasma-weld sheet metal - - none of the aforementioned has been university tested. But is does have a mondo-gnarly strobe and SOS mode if you find yourself adrift at sea in a small rubber raft and need to signal a distant PBY. I actually thought it might be decent signal device when I get the Jeep into gooey Bentonite in southern Utah. And since I failed Morse Code in the Navy, the SOS mode would be handy. That's how I got into Radar. Not quite smart enough for ET school and I had failed Morse so Radio was out.
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