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Nitecore CU6 440lm flashlight review: Pros and Cons

1 x Cree XP-G2 R5 LED, 1 x 365nm UV LED
440 lm output
9000 cd intensity
1 x 18650 Li-Ion battery

The Nitecore CU6 flashlight released in 2014. It uses 1 x Cree XP-G2 R5 LED, 1 x 365nm UV LED, SMO reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 440 lm output, 9000 cd intensity, and a beam distance of 190 m.

Table of Contents

The content of this article reflects our own experiences and viewpoints. We aim to offer insights on a topic, and we hope others find it helpful and motivating. Additionally, we make every effort to provide accurate and comprehensive coverage. If you found an error or something lacking in the specifications for the Nitecore CU6, then tell us.

Nitecore CU6 / CU6

The flashlight is a must-have tool for outdoor activities. These include camping, hiking, and night-time exploration, it offers guidance and safety. This light has 5 modes of lighting. The lack of mode memory means you need to adjust the flashlight's settings each time you turn it on. You can use the strobe function as a self-defense tool. It provides a non-lethal way to deter or disorient attackers.

Nitecore CU6 specifications

BrandNitecore
NameCU6
TypeCU6
Rating
Rated 3 / 5 based on 1403 user votes.
Launch2014
Formflashlight

Flashlights are unlike ambient or overhead lights. They let you aim the light where you need it.

Body, materials, weight, colors

Weight138 g
Length143 mm
Body diameter25.4 mm
Head diameter40 mm
Materialaluminium alloy with HAIII hard-anodized finish
Colorsblack

The CU6 is generally comfortable to hold for a long time. It is also easy to carry in pockets or bags. The best flashlight size depends on personal preference. It also depends on intended use and the specific features you want. The aluminium body of the CU6 has excellent thermal conductivity. This means it can effectively dissipate heat generated by the flashlight's components. The HAIII coating is often matte or textured. This finish improves grip and feels nice in the hand. The CU6 flashlight comes in a stylish black color.

System, LED, lens, reflector

Emitter1 x Cree XP-G2 R5 LED, 1 x 365nm UV LED
Color temperature6500 K
ReflectorSMO
Lenstoughtened AR coated glass
Switchdual electronic side, mechanical rear

Cree is widely regarded as a reputable LED manufacturer. Warm, white light is generally more comfortable. It's also less harsh on the eyes than cool, white light. The SMO's main job is to focus and project light from the source. It does this into a defined beam pattern. The AR coating reduces the loss of light due to reflections, allowing more light to pass through the lens. The CU6 flashlight has multiple switch options. They can be useful, adding versatility and convenience to using the flashlight.

The electronic switches may have a higher chance of standby drain. Mechanical switches are usually robust. They resist wear and tear and work in many environments. A simple press or click of the rear switch turns the flashlight on or off. This removes the need for complex button combinations or multi-step processes.

Performance, flux, intensity, throw

Flux440 lm
Intensity9000 cd
Throw190 m
CD/LM factor20.45

440 lm can provide a decent amount of brightness and be suitable for many everyday tasks. The CU6 flashlight has 9000 cd. It provides a much brighter and more intense beam. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. Candela per lumen (cd/lm) measures a flashlight's beam intensity. It compares this to its total luminous flux or output.

Software, user interface, modes

Modes5 modes
Mode memoryno
Ramping modeno
Strobeyes
SOS/Beaconyes

A flashlight's modes are different output settings or brightness levels. They can be chosen to meet different needs and preferences. Designers created the strobe function to produce a disorienting or attention-grabbing effect. The SOS code starts three short signals. Then, three long signals follow. Finally, there are three short signals again.

Features, battery, protections

Battery1 x 18650 Li-Ion battery
Battery indicatoryes
Charger portno
LVPyes
Thermal regulationno
ProtectionIPx8
AUX LEDsyes
Magneticno
SpecialsUV light
blue light
green light
red light
white light

The CU6 flashlight's power source is 1 x 18650 Li-Ion battery. It provides reliable, long-lasting energy for top performance. The battery indicator prevents surprise power failures. It ensures the flashlight is ready when needed. The CU6 cannot charge batteries. You may need an external charger to keep your battery going. The flashlight detects when the battery's voltage has dropped to a certain level. Then, it reduces or cuts off the power.

Flashlights without thermal protection may rely on other design elements to dissipate heat. These elements include heat sinks, fins, or body materials with good thermal conductivity. The "8" in the IPx8 rating means the highest level of protection. It is against water ingress. A flashlight has separate auxiliary LEDs. This removes the need for extra lights or filters. UV light is known to cause scorpions to fluoresce or emit a distinctive glow.

Accessories, package contents

Package contentsclip
lanyard
nylon holster
spare o-ring
spare rubber cover
tactical ring

The holster keeps your flashlight secure. It provides a reliable and easy way to do this when not in use. The clip is very helpful. It lets you quickly access your flashlight while keeping your hands free for other tasks. The lanyard of the CU6 protects the flashlight from accidental damage. It does this by stopping it from falling or hitting the ground. When using spare O-rings, follow the maker's instructions. Use their guidelines for proper installation.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the CU6 flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

Conclusion, pros and cons

This Nitecore flashlight, like any other, has its strengths and weaknesses. Let's take a close look at both sides to understand this flashlight better. I share my thoughts on its standout features and the parts that might need improvement. Keep in mind, these are just my opinions, and you might have a different perspective.

Pros

  • lightweight
  • aluminium body
  • AR coated lens
  • side switch
  • tactical switch
  • multiple modes
  • tactical strobe
  • SOS/beacon function
  • battery indicator
  • low-voltage protection
  • waterproof
  • auxiliary LEDs
  • UV light
  • protective holster
  • clip

Cons

  • cool light
  • moderated performance
  • no mode memory
  • no built-in charger
  • no thermal regulation
  • non-magnetic

Photos

Nitecore CU6 / CU6 photo 1.
Nitecore CU6 / CU6

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David Hagon
I love bushcraft and flashlights. I find joy in mastering wilderness survival skills and exploring the realm of illuminating gadgets. Bushcraft isn't just fun, it's a learning journey. I form a strong bond with nature. It's more than a hobby, it enriches me in practical and spiritual ways.
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