Insights

All About Signal Lights and Their Purpose

Introduction

Signal lights have existed as long as fire itself. (This line may sound like it was crafted for dramatic effect—and it is.) Yet, there’s some truth to the idea: once fire was discovered, it didn’t take long before one protohuman lifted a flaming branch and waved it to communicate with another. Thus, the signal light was born. A flaming branch became an early method of communication—simple, yet meaningful.

The Earliest Signal Lights

The concept of signaling with light began with nothing more than a torch—a burning stick. Over time, communication methods evolved. By waving the torch or smothering the flame to create rhythmic smoke patterns, early humans started to build a visual language. These early systems laid the foundation for modern signal communication tools that serve both practical and symbolic functions.

The Ontological

What is the essence of a signal light? In its most practical form, a signal or safety light is a tool designed to alert others to danger, unsafe conditions, or emergencies. These lights are often used in hazardous industrial environments or roadside situations to draw attention to potential threats. They also serve as visual indicators to request help or make your presence known from a distance.

The Recreational

Signal lights aren’t reserved solely for emergencies—they also serve recreational purposes, especially after dark. Whether you’re cycling, walking, running, or hiking at night (instead of during daylight hours like a sensible person might), signal lights are crucial. Not because you’re seeking attention (though we won’t judge), but because humans have poor scotopic (night) vision, and being visible ensures safety.

Activities like biking, jogging, hiking, camping, horse riding, skiing, and maybe even three card monte or astrapomancy (we don’t ask questions), are all made safer with signal lights. In short: if you’re outside in the dark, you need to be seen.

If you’re into nighttime outdoor gear, check out our complete outdoor gear collection to stay prepared.

NU Series

This is where the Nitecore NU Series comes into play. These ultra-lightweight, multi-LED signal lights offer a range of lighting modes, colors, and patterns with impressive runtimes. They’re built for maximum visibility and flexibility. Attach them anywhere—your head, arm, belt, shoe, or even creatively “betwixt the extremities.” The possibilities are endless.

Specifically, the NU06 LE and NU06 MI models are standout performers. Designed for multi-surface attachment, these lights come with three mounting options:

  • Flat plate with hook-and-loop backing for Velcro surfaces

  • Curved plate for helmets and rounded gear

  • Square MOLLE bracket for tactical use

Even better, the flat plate is magnetic, enabling attachment to any ferromagnetic material.

Looking for flexible mounting options? Check out our EDC gear for accessories to pair with signal lights.

Communication

Though originally tailored for law enforcement and military applications, the NU06 lights are accessible for everyone. The blend of multi-color outputs, versatile mounting, and reliable run-time makes them ideal not just for professionals, but also for hikers, campers, cyclists, and anyone else who needs to communicate a visual signal clearly.

Put simply, these lights are more than functional—they are effective tools for communication. Whether you’re marking your presence, signaling your location, or navigating a complex situation, they convey information efficiently and reliably.

For the latest in multifunctional signal light technology, visit nitecore.