Hiking Headlamp reccomendations request

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Hello all, I'm trying to find/make an LED headlamp without breaking the bank. I would use it for hiking, so some of the requirements are hands free/headlamp, light weight, and have reasonable battery life (whatever that means).

I found one link that looks promising: http://www.freewebz.com/led_headlamp/
but I would be remiss if I didn't ask the experts - also - would his design be more efficient with a reflector - or are leds more directional than incandescent lamps.

Thanks for any thoughts or advice.
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wow...i guess you gotta give it to him on the ingenuity side, but i tend to, at a minimum, like a case around my electronics!...and it looks like a b*tch to change the battery...

check out a thread over in the LED section...
http://www.candlepowerforums.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=001278
...the orginal headlamp is $6, the LS is $17 ro so dollars, so you could have a nice headlamp that takes standard AA batteries and is waterproof for about $23...all you need is a soldering iron, a little solder, a little bit of wire, and a small philips head screwdriver...

here's a thread about where to get an LS...
http://www.candlepowerforums.com/cgi-bin/ultimatebb.cgi?ubb=get_topic&f=3&t=001199

and, btw, i've read alot of stuff about using red light for preserving night vision that says that's a bunch of BS, an old wives tale...from what i understand the best way to preserve night vision is using the minimum amount of light to see what you're trying to see whatever color it is...and that the human eye is most receptive to the green and blue/green wavelengths so using those in low levels is the best...
 
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Ted the Led:
check out the $34.50 Black Diamond Moonlight; http://www.bdel.com/alpinism/headlamps.html
(mmm...Wonder how many LEDs in that new 3aaa powered xenon/LED "Gemini"?...)
<HR></BLOCKQUOTE>

Just one LED in the Gemini, the 1000hr burn time seems a bit high though. Too bad the halogen isn't voltage regulated like the spaceshot.
 
the moonlight is regulated, you know.. are you sure the gemini isn't? Something like a Willie Hunt circuit with the 4 light levels (like the Easter Seals Headlite III) would be great - 1000 hours for the LED may be plausible if it isn't at full brightness...i.e. 140 hours on low beam for 4 LEDs in the Moonlight, X 4 for 1 LED = 560 hours..if not run continuously, and maybe a bit dimmer...you might squeeze out something near a thousand..maybe.
 
Ted the Led, thanks much for suggesting the Moonlight - I had never heard of it and I was about to buy a Petzl Tikka. The Moonlight is brighter and adjustable for angle (The Tikka is not.), so it seems like the better choice.

I have not been able to find any description of the Moonlight that says it has two brightness levels, or that it is regulated. Where did you find that info? If it has those features also I don't see how I can live without it.
 
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by cosmic:
Ted the Led, thanks much for suggesting the Moonlight - I had never heard of it and I was about to buy a Petzl Tikka. The Moonlight is brighter and adjustable for angle (The Tikka is not.), so it seems like the better choice.
I have not been able to find any description of the Moonlight that says it has two brightness levels, or that it is regulated. Where did you find that info? If it has those features also I don't see how I can live without it.
<HR></BLOCKQUOTE>

cosmic;
I'm glad to have helped! Here is the url of Inner Mountain Outfitters: http://www.caves.org/imo/frames1.htm
look under LED flashlights, and scroll down for the Moonlight and you'll find the description; (a choice of 2 LEDs or 4 LEDs on at a time...)
...As for the regulation circuitry, here is all I was able to get out of BlackDiamond about it;
---------------
".....Hi Ted:

Our apologies for the not so prompt response. We just finished an ISO
Audit (which we passed succesfully) and our energies have been directed
inward the past couple of days.

The discharge curves of the LED with 3 AAA batteries has been tested and
tested to our satisfaction to provide the light quality we advertise.
If you have the capability to measure the initial current draw, you
should check at several intervals throughout the life of a set of
batteries.

There is a resistor (or more simply an "electronic element") in the
circuit which flattens the discharge curve.

We claim 70 hours, which is conservative and we feel that the brightness
after 70 hours is absolutely sufficient to perform basic camp chores or
even to see well enough to tie critical knots, although certainly not
well enough for difficult routefinding. Backpacker Mag has tested it to
over 140 hours although i have not seen their published article yet.
The reading thing is subjective---my nighttime vision is not very good
but other people can see just fine and read well after 100 plus hours.

I trust this will answer some or most of your questions. If you have any
other questions please ask and I will see what I can find out. However
please note that some information regarding these borders on proprietary
and may not be willingly shared.

Thanks again for writing and again our apologies for the late
response
Regards,
-Jeff
BD Customer Service.
-------
I bought one of the first ones, with one fixed light level, for $27. -- but I feel the same as you, I must have the 2 LED option! (I've been using NimH aaa's in mine lately..) Hope this helps some more! --TTL.
 
cosmic,
Perhaps I wasn't clear, the first price I mentioned for the Moonlight was the $34.50 price -- the $27.00 was the price I paid for the Moonlight when it first came out, but it it didn't have the two light levels, they raised the price for the new 2 brightness level model. I don't know if you can find the $27. fixed brightness model anymore anywhere...
The 70 hour runtime mentioned by BlackDiamond must be for the light set on "high-beam" (4 LEDs lit) -- while the 140 hour runtime quoted by IMO must be for the "low-beam" (2 LEDs lit)...
I don't know if the circuitry BD uses is 'just a resistor' -- or something more sophisticated -- their reluctance to discus it, and the run-time, seems to indicate the latter...?
 
Ted the LED:
When you first mentioned the Moonlight I did a Google search and checked out many vendors who sell it. None ot those I checked mentioned the ability to select two or four LEDs. The very favorable review at backpacker.com didn't mention it. Even the Black Diamond site doesn't mention it, but they don't mention that the head swivels either. It seems that the going price is $34.50, no longer the $27 you mentioned.

The Inner Mountain Outfitters site you suggested is the only one I've seen claiming that you can select between two or four LEDs. They also claim 140 hours of runtime while Black Diamond claims 70 hours.

I'm going to check out the local REI and Galyan's stores to see if the truth is out there.

In my opinion, a resistor is a current-limiting device to protect the LEDs from a voltage source that is too high for their rating, not a regulator of any sort. It doesn't matter much - most of the LED lights on the market are unregulated and perform well enough.
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