The Sofirn SD08 is more than just a diving flashlight—it is a highly capable, rugged lighting tool designed to perform in the most challenging conditions both underwater and on land. With a sleek yet durable body crafted from AL6061-T6 aluminum alloy and a suite of advanced features, the SD08 is built for divers, explorers, rescue professionals, and anyone who demands reliability and performance from their gear.

One of the most remarkable aspects of the Sofirn SD08 is its incredible beam distance and brightness. At its peak performance, it pushes out a powerful 3200 lumens of light, reaching a maximum throw distance of 385 meters. This long-range illumination ensures that divers can confidently scan their surroundings in open water, even at greater depths, and that land-based users can rely on the beam to pierce the darkness across wide fields, forest paths, or during nighttime rescue operations. Whether exploring deep caves, diving shipwrecks, or simply navigating rough nighttime terrain, the SD08 provides an exceptional level of visibility that enhances both safety and situational awareness.

Ease of use is another hallmark of the SD08. Instead of a complex and unintuitive interface common to many high-output flashlights, Sofirn has opted for a magnetic rotary switch that allows users to smoothly toggle between Low, Medium, and High modes with a simple twist. This interface is not only user-friendly but also highly practical in underwater environments where buttons can be difficult to operate, especially when wearing gloves. The smooth rotary action provides tactile feedback and secure mode selection, ensuring that divers or outdoor adventurers can adjust brightness quickly and efficiently without fumbling or needing to remember complex click sequences.

The SD08 is also equipped with an efficient boost driver, which plays a critical role in maintaining steady brightness throughout the duration of use. Unlike some flashlights that begin to dim rapidly as battery voltage drops, the boost driver ensures that output remains consistent until the power source is nearly depleted. This kind of dependable performance is especially important during dives or emergency scenarios where sudden loss of brightness could lead to disorientation or worse. Knowing that the SD08 can sustain a reliable output over time provides peace of mind in high-stakes environments.

A particularly innovative and eye-catching feature of the Sofirn SD08 is the inclusion of a 360° RGB light ring positioned around the head of the flashlight. This ring consists of 30 high-powered colorful LEDs that remain lit while the main light is in operation. More than just a stylish visual element, this RGB ring serves a functional purpose: it significantly improves the user's visibility to others in the area, especially in dark or murky underwater conditions. For group dives, night hikes, or tactical operations, this ring allows team members to locate and track one another with ease, adding an extra layer of coordination and safety.

Durability is one of the defining strengths of the SD08. The body is made from aerospace-grade AL6061-T6 aluminum alloy, known for its excellent balance of strength and lightness. It’s not only shock-resistant but also capable of withstanding deep submersion, with an IP68 waterproof rating that certifies it for use up to 100 meters underwater. This makes the flashlight fully suitable for deep sea diving, underwater photography, and marine exploration, while also protecting it from the elements during heavy rain or snow in terrestrial settings. The robust build ensures that it won’t falter in harsh weather, muddy conditions, or after an accidental drop, reinforcing its reputation as a tool built for extremes.

The SD08 is powered by a single 21700 lithium-ion battery, which offers excellent capacity and runtime. This battery format has become a favorite among high-performance flashlight users thanks to its energy density and rechargeability. The voltage range of 3.0V to 4.2V supports optimal driver function, and the flashlight is built with reverse polarity protection, which safeguards the circuit in case the battery is inserted incorrectly. A well-integrated temperature regulation system kicks in automatically when the internal temperature exceeds 55°C, intelligently reducing output to maintain a safe and comfortable external temperature and to preserve the longevity of the LED and battery.

The flashlight’s dimensions strike a balance between portability and performance. Measuring 124.1 mm in length and 37 mm in diameter, and weighing 127 grams without the battery, the SD08 is compact enough to be carried comfortably by hand or attached to gear, yet solid enough to feel dependable in use. Its size allows it to easily slide into a backpack, dive bag, or glove compartment, and it’s light enough to be mounted to a helmet or wrist strap without adding excessive bulk.

Maintaining the SD08 is simple and straightforward, particularly important for divers who regularly expose their equipment to saltwater. After use in seawater, it is recommended to rinse the flashlight thoroughly in fresh water for at least two minutes, paying particular attention to the rotary switch mechanism, where salt deposits are most likely to accumulate. After rinsing, a gentle shake helps release trapped water, and air drying ensures all moisture is removed. Following these steps will help preserve the integrity of the flashlight and its moving parts, allowing for many years of reliable service.

Operation is as intuitive as it gets. The rotary switch, located near the head, is turned counterclockwise to change between brightness levels. Each click provides solid feedback and ensures a dependable, waterproof seal that’s necessary for underwater function. Users can easily select the right output level for their needs—whether it’s conserving battery power on Low, achieving balanced visibility on Medium, or unleashing full brightness for maximum reach and clarity on High.

The Sofirn SD08 is not just a tool—it is a carefully engineered piece of gear that brings together power, efficiency, usability, and durability in one compact package. Its combination of long-range performance, steady output, vibrant RGB visibility ring, and deep-water waterproofing places it among the most well-rounded diving and outdoor flashlights available today. Whether navigating the ocean floor, crossing a remote trail at night, or managing an emergency in pitch blackness, users can trust the SD08 to perform without hesitation.

In conclusion, the Sofirn SD08 represents an ideal choice for those in need of a compact yet powerful lighting solution that thrives in both aquatic and terrestrial environments. With its straightforward operation, advanced driver system, bold RGB visibility feature, and rugged waterproof construction, it proves to be an indispensable companion for divers, adventurers, and professionals alike. It’s a flashlight that doesn’t compromise—delivering light where and when it’s needed most.

General Operation