When dusk sets in, and then darkness, then for general lighting in emergency conditions you will have a fire or a candle, unless of course you have it with you. As a portable light source, you can use a homemade torch or Native American candle, as well as other lighting.
Lighting, hand and headlamps, chemical light sources, in survival kits.
However, a bright, small-sized and waterproof flashlight is still more convenient, practical and has an obvious advantage over various homemade products. An electric lamp will save you from unplanned spending the night in the forest, help you avoid obstacles in the dark, allow you to move at night to avoid the desert heat during the night, facilitate the collection of firewood in the dark, and will give many other advantages.
If you are looking for, then the flashlight turned on in flashing mode or SOS mode will significantly increase the likelihood and chances of your detection by lifeguards in the dark or in conditions of limited visibility. Because man is a creature more focused on the visual perception of the environment than on any other.
Since we are talking about a lantern for a set of survival, then the requirements for it will be appropriate. Small in size, waterproof, ideally waterproof. Rugged housing, on one battery as widespread and inexpensive as possible, long service life, at least two modes. One bright, the second economical, and preferably SOS mode or just blinking mode.
survival kits. If there is enough space in the package of your kit, then you should pay attention to the headlights of companies such as Petzl, Black Diamond or Zebralight.
Chemical light sources (HIS, Lightstick) as a means of lighting.
Chemical light sources were developed back in the fifties of the last century to provide lighting at work sites or accidents. Where there is the possibility of the presence of chemicals, flammable gases or flammable liquids. They are available in various colors. They have a body length of 10 to 40 centimeters and a glow time of 5 minutes to 12 hours. Due to their size, HIS can be of little use for the assembly of small-sized wearable survival kits. Although they have a number of advantages over electric flashlights: 360-degree circular light without the formation of shadow and glare, work under water, do not require a power source.
A chemical light source consists of two components, one of which is an activator, and the other is a luminous composition. Both substances are enclosed in a sealed plastic case. One reagent is placed in a glass capsule. To activate a chemical light source, it is necessary to bend and crush the glass capsule. Then shake. Reagent substances mix and produce light, the brightness of which depends on their composition.
It should be remembered that at low temperatures, the intensity of the luminescence of CID decreases, and the operating time increases. At high temperatures, the opposite is true. Chemical light sources have a certain shelf life. It is indicated on its case or on the packaging, usually up to 4-5 years. As an alternative to a chemical light source, if necessary, 360 degree circular lighting, white, red or orange nozzles for AA or AAA format lights can be considered.