This reaction can be calibrated by the manufacturer to glow dimly for a long period or brightly for a short while, but either way, the stick’s light will gradually fade after a few hours. These flexible plastic tubes contain a glass ampoule that can be snapped to mix two chemicals, inducing a reaction known as chemluminescence. The most commonly known ID light is the chemlight, also called a glowstick. Identification lights are typically compact, lightweight, and durable - some are even intended to be disposable one-time-use items. Enter the identification light, a device designed to attach to your gear and provide a source of long-lasting, clearly visible light. And in a SHTF situation, a persistent light source provides the means to signal for rescue after dark.Ī flashlight or headlamp can illuminate your field of view, but these directional light sources aren’t ideal tools for making others aware of your position (at least not without temporarily blinding them). It’s also a hazard in urban environments, because motorists may struggle to see you from a distance. This poses a safety risk during nighttime group activities such as hiking and cycling, since it’s easy to get disoriented and separated when you can’t clearly see your friends. As ambient light fades, our eyes struggle to perceive even the faintest outlines of objects in our immediate vicinity. Compared to other members of the animal kingdom, humans have a major deficiency: poor night vision.
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