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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

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 ...


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 ...


1

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 ...


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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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