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24

Red light preserves your night vision. Red lights are used in photography dark rooms, military bunkers, submarines, and anywhere you might find yourself working in the dark. It gives you light to see, while at the same time keeping your eyes adjusted for the dark. I use my red light mostly when I'm when I'm around a camp fire, in the middle of the night ...


14

Here is what I look for in a good headlamp: LED is best for most uses, but you need to decide if you want a "spot focused" LED (usually one high powered LED in the center) or "diffuse light" LEDs (usually an array of many small LEDs). I like headlamps that have both, but sometimes you want one over the other (do you want maximum distance vision on a dark ...


13

For night trekking, I use a headlamp. Couple of reasons: Keeps your hands free. (Useful when you are walking up steep slopes) No worry of dropping them flashlight (Had happened to me once where my flashlight rolled down the hill) Advantages of a flashlight over a headlamp: More powerful and directional. (No need to strain your head in weird angles to ...


12

The automatic f-stop mechanism (iris) in your eye is less sensitive to red light than the shorter wavelengths. Therefore, red light provides some illumination, but doesn't trigger your eye to stop down and make you temporarily blind when you shut the light off. There are also other ways your eyes adapt to ambient brightness that are also less sensitive to ...


11

I would guess it's a carbide lamp as it was in former times used by mining workers and is still used in speleology (caving) sometimes. The basic working principle is a box with carbide and a water reservoir from which water slowly drips onto the carbide. Carbide and water chemically react and form acetylene gas which is guided through a hose to a small ...


11

For me, feature number one is regulated light output. When I bought my first head lamp I was quite surprised that the brightness significantly dropped after a few initial hours. This is called unregulated light output: the brightness simply decreases as the battery level goes down. It means that you will only enjoy decent brightness for the first 20 % of ...


10

For search party purposes, bigger is almost always better, both from the perspective of the lost individual - he/she may be able to see the light from a distance and make themselves more visible or move towards the light, and from the searcher trying to see their target, perhaps an unconscious individual - spotting clothing or non-natural material is much ...


8

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’...


8

Beam spread -- Wide, narrow, adjustable? (depending on what you want) Angle (generally up/down) -= Can you direct it where you want? Ease of turning on/off and changing settings -- I personally hate lamps that make me cycle through strobe to get to another setting (yes a few do) Strap & Comfort -- Is your head going to ache after wearing it for hours? ...


8

I tried out both options when I started night hiking and can share the following observations: Flashlights are generally more powerful and directional - you can point a beam of light much further away; useful if you are trying to see further around you, for example to determine where each fork in the trail leads. Headlamps are less powerful for the same ...


7

Simply put, lumens is the total amount of light coming out of the flashlight, and lux is the measure of how much of that light is focused in one area. One lux equals one lumen per square metre. If light were paint, lumens would be equal to litres, and lux would be how thickly you apply the paint. If you're only covering a small area, then you can make your ...


5

I'd think that it will depend very much on what you search for: do you expect the person to respond, e.g. put up whatever scrap of reflective material they have with them when they see your search-light? In that case, and open landscape a highly brilliant lamp would be good: you could sweep a large space slowly with such a light and look for reflections. ...


5

I have used both for night hiking, and I like a headlamp way better. The main reasons are that it leaves the hands free, and the light is aiming roughly in the direction I'm looking. I made my own headlamp with 4 white LEDs in series: This seems to be a good brightness for hiking and seeing the ground in front of you. Having it built into a hat is also ...


5

From a related post: Lumens is the SI unit for luminous flux, which is essentially the total amount of light in the visible spectrum emitted by a source in all directions. Lumens does not depend on distance from the light source, because it must be measured in all directions. A related unit, lux, measures the amount of light hitting a certain surface ...


5

I cannot say if there are standard signals between mountaineers, however from hiking I know the following three light signals are used: Warning: Wave the flashlight back and forth to signal a warning to those around you. Use this signal when you spot a potential danger such as a wild animal, steep cliff or unsafe terrain. OK:Point your flashlight toward ...


4

The UltraFire product is manufactured by WhaFat Technological Company, which is based in Hong Kong. Their products look very similar to SureFire flashlights, so it's possible that UltraFires themselves are clones/knockoffs. That said, the WhaFat website recommends purchasing from an official dealer, but they don't mention any. ultrafire-shop.net claims to ...


4

Mountain distress signals vary slightly depending on what country your in. In the UK the general distress signal is to use a whistle (Alpine distress signal), not a torch. This is so it can be identified in poor visibility. Many backpacks come with a whistle integrated into the webbing, the bright orange bit below: It's usually 6 blasts of a whistle at ...


4

In my personal experience, a headlamp is much better. It doesn't have the directional capabilities of a traditional flashlight, but it leaves your hands free for other tools. During an emergency hike/climb down a mountain in sub-zero temperatures I needed to use my hands to hold on to trekking polls and other hand-holds and the headlamp saved my life, I ...


4

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 ...


3

There are several features you could want or ignore in a head torch. So this answer is subjective. A good head torch should be bright of course with a good distance to it, you don't just want to be able to see a few feet in front of you. In other situations, you want a wide illuminated angle, so it would be nice to be able to toggle between this mode, and ...


3

This is not an easy question to answer. More lumens means better light, normally also further range. But if you dive in areas with lots of suspended particles in the water you will get a lot of back scatter which in effect impacts on visibility. Then the next question is do you need it for night dives or just to help see more colours on deeper dives where ...


2

Lumen: The lumen is essentially the amount of light emitted from the point source. A candela is roughly the amount of light emitted from one lit candlestick in any direction over an angular span. A lumen is considered the luminous flux of that light source and can be found by multiplying the intensity (the candela) by the angular span over which the light is ...


2

Night vision and, if you're camping with a partner, a nice way to not blind them around camp. It is also a way to see in the dark without disturbing animals you're hunting, or the fish if you're night fishing.


2

I'm going to have to disagree with others here about headlamps. Although they can come in handy in certain situations, I don't really like them for hiking. For me, a handheld flashlight is best for the following reasons: GLARE! This is probably my least favorite thing about headlamps. When you have your light source so close to your eyes, any mist or dust ...


2

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 ...


1

A flashlight is in my experience much better for traveling at night. This because: It throws out a more powerful beam than almost any headlamp - The problem with a headlamp is that any bright enough beam to be useful on most trails is going to affect your vision (especially if you wear glasses) Most headlamps are only comfortable to wear for relatively ...


1

If you decide on something really bright, check out scuba diving lights. They are made extra tough, extra bright and are waterproof. And, you want to carry two: One bright one for searching and a smaller one for reading something, examining a person for injuries, etc. You also want the smaller one as a backup just in case something happens to the larger one.


1

With regards to searching or SAR, I think @Rory Alsop, hit the nail on the head. You really want a brighter and wider field of light when searching for someone. However, as an avid backpacker, you don't need that many lumens. So... if you are searching for a path or night hiking, I use a 70 lumen headlamp that has worked fantastically well and when I need to ...


1

for me I look at Amount of lumens produced Several modes (battery saving to full on light everything up) Battery life Bulkyness (or lack of!) You can get good LED torches that have all of the above these days. Small, good output and good battery life.



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