Noctigon KR4 3000lm review. Is it worth it in 2023?

4 x Luminus SST20 LEDs
3000 lm output
18500 cd intensity
1 x 18650 Li-Ion battery

The Noctigon KR4 (KR4) released in 2020. It uses 4 x Luminus SST20 LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 3000 lm output, 18500 cd intensity, and a beam distance of 272 m.

The KR4 is a powerful and reliable flashlight. With its impressive illumination capabilities and durable construction, it serves as an exceptional lighting tool for various situations and environments. TIR technology minimizes hotspots, dark spots, and irregularities in the beam of KR4. The memory function is a nice feature, the light will remember the last used mode. It has a strobe function, which is one of the most effective self defense tools available.

Table of contents:

Noctigon KR4 (KR4) specifications

Rated 3/5 based on 1141 user votes.

The KR4 flashlight offers precise and focused illumination. Unlike ambient or overhead lighting sources, flashlights allow you to direct the light exactly where you need it.


Weight95 g
Length98 mm
Body diameter24 mm
Head diameter29 mm
Materialaluminium alloy with HAIII hard-anodized finish

The KR4 is small, compact, and designed for ultra-portability. The length of the KR4 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. The aluminium body of KR4 has excellent thermal conductivity, meaning it can effectively dissipate heat generated by the flashlight's components, such as the LED or battery.

The body of KR4 flashlight treated with a Type III hard-anodized, anti-abrasive finish. The KR4 flashlight is available in assorted colors: black, cyan, gray.


Emitter4 x Luminus SST20 LEDs
Color temperature6500 K
Switchelectronic rear

The emitter of KR4 manufactured by Luminus, a US-based LED manufacturer. Luminus is recognized as a reputable LED manufacturer in the lighting industry. They are known for producing high-quality LEDs with excellent performance and reliability. Color temperature is a characteristic of light. It is measured in units called Kelvin (K) and is used to quantify the color appearance of light sources, particularly white light.

The TIR lens of KR4 can minimize light loss and achieve high light output by capturing and redirecting a significant portion of the emitted light. This can result in improved overall beam quality, better beam control, and reduced stray light. The KR4 utilizes electronic switch. Electronic switches on flashlights provide a range of advantages and additional features compared to mechanical switches. The rear switch of KR4 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.


Flux3000 lm
Intensity18500 cd
Throw272 m
CD/LM factor6.17

With 3000 lm, the KR4 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. The KR4 flashlight with 18500 cd has an extended throw distance, allowing you to illuminate objects or areas at greater distances. This can be advantageous for outdoor activities, search and rescue operations, or scenarios where long-range visibility is required.

The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. Candela per lumen (cd/lm) is a measure of a flashlight's beam intensity relative to its total luminous flux or output. It quantifies the concentration of light emitted by the flashlight in relation to the total amount of light produced. A flashlight with a higher CRI can provide better color accuracy when examining objects or distinguishing between different colors in low-light or nighttime situations. This can be beneficial in certain tasks or activities where color discrimination is important, such as identifying wires or reading color-coded information. The KR4 flashlight with a CRI of 95 offers the most accurate and true-to-life color representation, allowing you to perceive colors as they were intended to be seen.


Mode memoryyes
Ramping modeyes

The Anduril firmware is an open-source firmware developed for flashlights. It is designed to provide advanced control and customization options, offering a high degree of flexibility and functionality. The KR4 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 advantage of the ramping mode is that it offers precise control over the amount of light emitted by the flashlight.

The KR4 is tactical strobe ready. The strobe light is disorienting to the person it is aimed at which makes it difficult for them to concentrate. It has the SOS beacon function for an emergency situation. The SOS flashes Morse code so you can signal for help when needed. The SOS signal is recognized as an international distress call and is used to indicate an urgent need for assistance.


Battery1 x 18650 Li-Ion battery
Battery indicatoryes
Charger portno
Thermal regulationyes

The Noctigon KR4 flashlight is powered by 1 x 18650 Li-Ion battery. The battery indicator lets you know when the battery is low, charging, or fully charged. The KR4 cannot charge batteries directly. You may need an external charger to keep your battery going. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary.

The built-in thermal control automatically adjusts brightness output to prevent overheating. The "6" in the IP67 rating represents the level of protection against solid objects, specifically dust and foreign particles. It indicates that the KR4 flashlight, is fully protected against the entry of dust and other solid objects. The "7" in the IP67 rating indicates that the KR4 flashlight, can withstand being submerged in water up to a certain depth for a limited time without being damaged. It has auxiliary LEDs which make it really nice looking.


Package contentsclip

The clip is useful to keep the light secured in your pocket.

The performance of the Noctigon KR4 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.

The specifications above 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 Noctigon KR4, then don’t hesite and signal the problem to us.

Noctigon KR4 (KR4) pictures

Noctigon KR4 / KR4 photo
Noctigon KR4 / KR4 photo
Noctigon KR4 / KR4 photo
Noctigon KR4 / KR4 photo
Noctigon KR4 / KR4 photo
Noctigon KR4 / KR4 photo
Noctigon KR4 / KR4

Noctigon KR4 (KR4) comparisons

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