Foursevens Quark QK16L MKIII 700lm In-depth review, Pros and Cons

Nichia 319A LED
700 lm output
7225 cd intensity
1 x 16650 Li-Ion battery

The Foursevens Quark QK16L MKIII (QK16LMKIII) released in 2019. It uses Nichia 319A LED, OP reflector and 1 x 16650 Li-Ion battery. The powerful emitter in this flashlight provides up to 700 lm output, 7225 cd intensity, and a beam distance of 170 m.

The Quark QK16L MKIII is an impressive flashlight that offers both power and reliability. Its robust build and outstanding illumination make it a versatile lighting instrument. This light has 4 modes of lighting. The mode memory of Quark QK16L MKIII eliminates the need to cycle through different modes every time you turn on the flashlight, providing convenience and saving time. The strobe function can be utilized as a self-defense tool, providing a non-lethal means to deter or disorient attackers

Foursevens Quark QK16L MKIII (QK16LMKIII) pictures

Foursevens Quark QK16L MKIII / QK16LMKIII photo
Foursevens Quark QK16L MKIII / QK16LMKIII photo
Foursevens Quark QK16L MKIII / QK16LMKIII photo
Foursevens Quark QK16L MKIII / QK16LMKIII

The specifications below are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Foursevens Quark QK16L MKIII, then don’t hesite and signal the problem to us.

Foursevens Quark QK16L MKIII (QK16LMKIII) specifications

NameQuark QK16L MKIII
Rated 4/5 based on 1203 user votes.

Flashlights are compact and lightweight, making them highly portable. They can easily fit into pockets, backpacks, or glove compartments, allowing you to carry them wherever you go.


Weight90.7 g
Length114.3 mm
Head diameter22.4 mm
Materialaluminium alloy with HAIII hard-anodized finish

This 90.7 g flashlight would generally be considered lightweight and easy to handle for most people. The length of the Quark QK16L MKIII flashlight can affect its portability. A shorter flashlight is generally easier to carry in a pocket, bag, or pouch, making it more convenient for everyday use or when you're on the go. Aluminium body of Quark QK16L MKIII is known for its durability and strength. It offers excellent resistance to impacts, scratches, and corrosion, making it suitable for rugged outdoor use or in demanding environments.

Hard-Anodized Type III (HAIII) is a specific anodizing process that creates a thicker and harder oxide layer compared to regular anodizing. It involves subjecting the aluminum to a higher voltage and a sulfuric acid bath, resulting in a dense and durable coating. The Quark QK16L MKIII flashlight is available in black.


EmitterNichia 319A LED
Color temperature5000 K
LensAR coated glass
Switchmechanical rear

The emitter of Quark QK16L MKIII manufactured by Nichia, a Japanese LED manufacturer. Warm white light is generally considered more comfortable and less harsh on the eyes compared to cool white light. The Quark QK16L MKIII has an orange peel (OP) textured reflector. Orange peel reflectors have smoother beams. This flashlight has an AR coated lens. This Anti-Reflective coating is a thin optical coating applied to the surface of the lens to minimize reflections and improve light transmission.

The Quark QK16L MKIII has mechanical switch. Mechanical switches are known for their durability and reliability. They are typically built with robust construction, making them resistant to wear and tear, and capable of enduring various environmental conditions. The rear switch of Quark QK16L MKIII is typically operated with the thumb or finger, making it easily accessible and convenient to use. The positioning of the switch at the rear of the flashlight allows for natural and intuitive operation, particularly in one-handed scenarios.


Flux700 lm
Intensity7225 cd
Throw170 m
CD/LM factor10.32

With 700 lm, the Quark QK16L MKIII flashlight will offer a brighter and more powerful beam of light. This higher output can be advantageous in various situations where you require enhanced visibility or need to illuminate larger areas. With 7225 cd, the Quark QK16L MKIII flashlight provides a noticeably brighter and more intense beam of light. It can illuminate objects or areas with greater clarity and visibility, even at longer distances.

The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor (candela-to-lumen ratio) provides information about how concentrated or focused the light output of a light source is. A higher cd/lm ratio indicates that the light is more concentrated in a specific direction, while a lower ratio indicates a more diffused or spread-out light output.

If accurate color representation is a priority for your specific needs, a flashlight with a CRI of 90 or above is highly recommended. This higher CRI flashlight can offer even more accurate color rendering, particularly in applications where precise color discrimination is essential, such as photography, art evaluation, or tasks involving color-coded information.


Modes4 modes
Mode memoryyes
Ramping modeno

Modes on a flashlight refer to different output settings or levels of brightness that can be selected to suit different needs and preferences. The Quark QK16L MKIII has mode memory. Mode memory means that the flashlight will remember the mode you were using when the light was last turned off, and when you turn it on again. The strobe function on the Quark QK16L MKIII flashlight is a feature that produces a rapid and repetitive flashing of light. It is designed to create a disorienting or attention-grabbing effect. The Quark QK16L MKIII has an SOS signal mode. The SOS code consists of three short signals, followed by three long signals, and then three short signals again.


Battery1 x 16650 Li-Ion battery
Battery indicatorno
Charger portno
Thermal regulationno

The power source of the Quark QK16L MKIII flashlight is 1 x 16650 Li-Ion battery, providing reliable and long-lasting energy for optimal performance. The Quark QK16L MKIII cannot charge batteries directly. You may need an external charger to keep your battery going. When the Quark QK16L MKIII flashlight detects that the voltage of the battery has dropped to a certain threshold, it automatically reduces or cuts off the power output to prevent further discharge. This helps to preserve the battery's capacity and prevent it from reaching a critically low voltage level.

Flashlights without thermal protection may be more susceptible to overheating under extreme conditions, such as prolonged high-output use or exposure to high ambient temperatures. The "8" in the IPx8 rating indicates the highest level of protection against water ingress.


Package contents16650 battery
spare rubber cover

By including a battery with the flashlight, you avoid the additional expense of purchasing a battery separately.

The performance of the Foursevens Quark QK16L MKIII flashlight is measured according to the ANSI / NEMA FL1 Standard 30 seconds after switching the light on. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

Foursevens Quark QK16L MKIII (QK16LMKIII) comparisons

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Foursevens Quark QK16L MKIII (QK16LMKIII) Foursevens Quark QK16L MKIII

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