39

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 by, 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 ...


23

I would recommend any LED headlamp, it's a huge difference to old school flashlights (much brighter and batteries last much longer). Headlamp because you want to have your hands free if you got to carry something or if the path is slippy after rain. I would make sure it has at least two light modes (dimmed and full) to be flexible and use it for reading too. ...


21

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 ...


18

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 ...


17

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 ...


17

The point of the velcro is to hold the light onto your finger, and the extra length makes it possible to use with gloves. These have several advantages, Originally designed for pilots, the popularity of these simple-to-use lights have made them required tools for ground forces, battle tank, medical personnel and logistics staff. Anywhere hands free light ...


15

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 ...


14

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 get ...


11

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’...


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 ...


10

How to touch up scratches on a black anodized aluminum flashlight? Try using black nail polish on your flashlight 🔦. But make sure it is a good quality nail polish and not something from the Dollar Store. People have used nail polish to remove scratches on cars for many years now. Some people may only know nail polish as something women put on their ...


9

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 ...


9

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 ...


7

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 ...


7

Just found this and thought it rather interesting and adds just a little something more to the already great answers posted. The following is from the Flashlight University: LED Colors and Uses. White: Great for all around, every day illumination. Red (630 nm): Red LEDs are do not appear as bright to the human eye as white LEDs. If your eyes are ...


6

In addition to the answers already mentioned, I prefer red light while outdoors in the summer because it seems to attract fewer insects. I always seem to have more insects flying around my face if I use white, and fewer with red.


6

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 ...


6

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 ...


6

I would recommend a tactical military-grade flashlight. I personally use one and will not go back to any other style now. Not only do they have the option of going from a strong beam light to a wide surface light, but they are small and can fit in your pocket. Here is an example image of the one I use and keep in my vehicle at all time can be seen here.


6

"How can I [make] it completely black?" Cover it with something black. Drawing on it with a black marker will work, but that might rub off after serious use. You could use black spray paint, but that requires etching into the rest of the anodized part. Black electrical tape would be great, and makes it a little more grippy when wet, but gets gross after a ...


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. E....


5

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.


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

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

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 ...


4

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 a ...


4

I know that some animals find hard to see red and they can't differentiate between red and green very well so I'd assume green and red have the same application (used in dark places) with red being a better option. Ultraviolet light is used for forensic applications but it's a specific blue light not just a light that is blue so I'd also assume that the ...


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