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I'm looking to buy a flashlight/torch (or build my own even if that works out cheaper), and am looking to take the following into consideration:

  • Good battery life (LEDs would probably suit best in this regard)
  • Takes rechargeable batteries of common size (so AA, C, D - some don't seem to)
  • Rugged (when used for hiking / backpacking, you don't want something that might just give out!)
  • Bright (I'd like this thing to be bright enough for night walking - say at least 150-200 lumens.)

Is there anything else I should consider? And would you recommend purchasing one, or building your own in terms of value for money (and considering I'm comfortable with electronics?)

I'm mainly looking to use it for night hiking and night geocaching.

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Two points -- "Bright" is incredibly subjective. Bright in comparison to... a 40 watt bulb? I'd give some benchmark to give people and idea of what "bright" means to you. Rechargeable batteries tend not to "shelf" well, which is why I don't use them for hiking. They are usually more "charge and use", and for a torch I generally want more "use when needed". –  Russell Steen Nov 1 '12 at 16:46
    
@RussellSteen I've updated the brightness front to give a more objective point there. In terms of rechargeables, up until recently I would have agreed with you. However, I've used Eneloops for some time now and they hold their charge phenomenally well, to the point where I've charged and left them for over a year and they've performed just fine without a recharge. –  berry120 Nov 1 '12 at 16:50
    
waterproof/ water-resistant and at two brightness modes (bright and brighter) –  Amine Nov 1 '12 at 17:06
    
@berry120 -- I need to give the eneloops a try –  Russell Steen Nov 1 '12 at 17:39
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Not an answer, but in addition to the torches we take (ranging from basic ones to multi LED bright ones for those occasions when you really do need brightness) we have also started taking a couple of the hand powered torches for longer trips, just to cope with those occasions all batteries are dead/lost etc –  Rory Alsop Nov 2 '12 at 10:45
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3 Answers

If you just want to solve the problem, go buy a LED headlamp. There are now quite a variety available on the market.

A bunch of years ago this wasn't the case, and I built my own. It drives 4 white LEDs from two AA batteries. I calculate about 20 hours run time from two fresh batteries, although I have not actually logged hours to verify that. 20 hours is a long time, so a single spare pair of batteries is all you need as a backup. I use mine a few minutes to a few 10s of minutes at a time mostly, and it lasts a long long time that way. You can see all the gory details along with schematic and kludgy mechanicals at http://www.embedinc.com/pic/knli/index.htm.

I did this for fun and challenge and back when such things weren't commonly available. If I just wanted a light right now I'd probably go buy one.

I don't know the lumens, but this light doesn't look like much in the daytime, but is plenty bright enough to hike in the woods with at night.

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LED Headlamps are a good idea. There are several commercially available ones for <$100 that meet the posters requirements. And there are cheaper ones ~$20 that aren't quite as bright, but still usable. Being able to function hands-free is really nice. –  DavidR Nov 7 '12 at 21:55
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I recently got this. 41bgn. Takes 4 AA batteries (I do not like the tiny AAA-s; also 4, not two). Is VERY bright with fresh batteries. Not too heavy. Also, they claim it is for divers -> good in the rain. I use Eneloop batteries, guaranteed to have very low self discharge (I have been having them for two years and hold many hours of lightning). Hand strap is very nice.

I recently ordered a flashlight holster for the belt.

One thing that you might consider important is the power button. You do not want the flashlight turning on in your backpack and discharging it's batteries. I carry them with the batteries removed, but that is huge inconvenience: snow, rain, darkness etc.

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I hate hate hate cyclists and campers blinding me all the time - that is why I got a flashlight. However, I am getting a headlamp for my biking.

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I don't understand how getting a flashlight will keep cyclists and campers from blinding you all the time. It seems you want them to get the flashlight. –  Olin Lathrop Nov 8 '12 at 0:07
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Yep, I do not like being blinded, so I strive to not blind others. –  Vorac Nov 8 '12 at 9:29
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  • I would buy a headlamp, it’s so much more convenient to have your hands free and the light always pointing where you look.

  • I would go for two/four AA bateries. My current headlamp uses three AAA’s. The odd number is not practical when buying or charging and if it used regular AA’s instead, I could exchange the batteries with my GPS or my backup phone. The AA’s are also dead easy to buy, just in case. In winter with temperatures well below zero Celsius, you might want to get lithium batteries that cope with freezing well. Again, these are easier to get in the AA format.

  • I would never ever buy a lamp without regulated light output. A lamp without regulated light output will slowly drop the light level as the batteries go down. With some lamps that means first several hours of nice light and the remaining 60–80 percent of time the light is too dim. Regulated lamp keeps the light output constant and when the batteries can no longer keep up, the light stops. This is not a universal view, some people prefer unregulated lamps. (Still not sure about the reason.)

  • It’s nice to have several light level settings, like a dimmer light for finding things inside a tent. (200 lumens inside tent would probably look like a UFO.) Some manufacturers throw one red LED inside, which is also nice because the red light doesn’t take away your night vision. It’s great when the modes can be switched independently of the main switch – cycling through all the modes to get the right one gets old quickly.

  • I second the rugged body and water proofing. It’s nice when you can put the lamp into a stream to atract crayfish or take it with you to sauna. Be vary about thin strips of plastic in the construction. My Princeton Tec Quad used to be water proof, but I managed to break a tiny plastic bridge above the glass, and now the humidity can get inside.

  • Building a good lamp is a lot of trial and error. I am happy to pay for a commercial one so that the manufacturer can suffer the errors for me; I wouldn’t want to be my own lab rat.

Fenix HL30 would be my choice right now. Two AA batteries, 200 lumens peak output (for a limited time), regulated light, sturdy construction, reputable company.

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Thanks for these points and the recommendation, appreciated! The only point where I'd differ is on the headlamp aspect, I've found them great when I'm on my own but when walking in groups everyone has a tendency to blind each other when they turn around! –  berry120 Nov 5 '12 at 13:06
    
On related front, for Petzl Nao adapts the light power according to where you look. I don’t think it’s designed against blinding other people, but it’s worth mentioning. Also, it’s easier for a headlamp to double as a flashlight than the other way around. But if you insist on getting a flashlight (I understand that), Fenix also makes flashlights that look very nice. –  zoul Nov 5 '12 at 13:39
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