I have seen a survival kit that has been spoken well of by many reviewers: the SERE Air Force Survival Kit. SERE stands for: survival, evasion, resistance, escape.

It is a rather small kit fitting in roughly the size of an altoids tin box. In the kit there are the basic things that are axiomatic to survival such as: compass, first aid, signal mirror, flints and so forth. Then one item that stood out was finger lights with Velcro straps. It was just kind of glossed over in the reviews I saw, and I also could not get much info elsewhere on the internet. All I know is:

• one is red light (visible)
• one is infrared (for use with night vision)

Since I thought perhaps it would be useful for putting it over your finger as you pointed at a map in a dark environment. While this makes sense, I'm not sure the space and weight these items take up in the kit would be justified if it provides merely more convenient map reading (with all due respect to map reading). Here is a picture of the SERE kit with the lights in the red circle:

As you can see, they look good and well engineered, and I assume as a GI product the purpose is not to just roleplay as iron man.

Question: Perhaps it is the Velcro strap and notion that the lights go on our fingers that confuses me the most; what is the advantage of this? What is the typical use case for such a device? Perhaps we can also Velcro it to a small twig or something?