Acebeam TK18 CU Nichia flashlight review

3 x Nichia 219C LEDs
1650 lm output
9160 cd intensity
1 x 18650 Li-Ion battery

The Acebeam TK18 CU Nichia flashlight released in 2019. It uses 3 x Nichia 219C LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 1650 lm output, 9160 cd intensity, and a beam distance of 191 m.

Wondering if this flashlight is a hit? Stay tuned!

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 Acebeam TK18 CU Nichia, then tell us.

Acebeam TK18 CU Nichia / TK18CUN

The TK18 CU Nichia flashlight is a key tool in many situations. It's used for everyday tasks, outdoor adventures, emergencies, and professional work. TIR technology minimizes hotspots, dark spots, and irregularities in the beam of TK18 CU Nichia. This light has 5 modes of lighting. The TK18 CU Nichia mode memory eliminates the need to cycle through modes. You don't have to do this each time you turn on the flashlight. It provides convenience and saves time. You can use the strobe function as a self-defense tool. It provides a non-lethal way to deter or disorient attackers.

Acebeam TK18 CU Nichia specifications

NameTK18 CU Nichia
Rated 4 / 5 based on 1409 user votes.

The TK18 CU Nichia flashlight allows you to light dark areas. It helps you find hazards or stop threats by shining light on them.

Acebeam TK18 CU Nichia / 3

Body, materials, weight, colors

Weight124.5 g
Length105 mm
Body diameter23 mm
Head diameter25.5 mm

The TK18 CU Nichia is generally comfortable to hold for a long time. It is also easy to carry in pockets or bags. Consider the length of the flashlight. It should fit comfortably in your chosen way to carry it. The TK18 CU Nichia flashlight comes in a stylish copper color.

Acebeam TK18 CU Nichia / 2

System, LED, lens, reflector

Emitter3 x Nichia 219C LEDs
Color temperature4000 K
Switchmechanical rear

Their exceptional color quality is a well-known characteristic of Nichia LEDs. They are also known for their high efficiency and long lifespan. Warm, white light is generally more comfortable. It's also less harsh on the eyes than cool, white light. The TIR lens of the TK18 CU Nichia can reduce light loss. To achieve high light output, it captures and redirects much of the emitted light. Mechanical switches are usually robust. They resist wear and tear and work in many environments. The rear switch of the TK18 CU Nichia is rugged and durable. It can withstand harsh conditions and repeated use.

Acebeam TK18 CU Nichia / 1

Performance, flux, intensity, throw

Flux1650 lm
Intensity9160 cd
Throw191 m
CD/LM factor5.55

With 1650 lm, the TK18 CU Nichia flashlight will offer a brighter and more powerful beam of light. The TK18 CU Nichia flashlight has 9160 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.

If accurate color is a priority for you, choose a flashlight with a CRI of 90 or above. The TK18 CU Nichia flashlight has a CRI of 95. It offers the best color representation, colors can be seen as intended.

Software, user interface, modes

Modes5 modes
Mode memoryyes
Ramping modeno

A flashlight's modes are different output settings or brightness levels. They can be chosen to meet different needs and preferences. The flashlight has mode memory. It remembers the mode you were using when the light was last turned off. It stays in that mode when you turn it on again. Strobe mode on TK18 CU Nichia flashlight produces a rapid, repeated flashing of light.

Features, battery, protections

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

The TK18 CU Nichia flashlight's power source is 1 x 18650 Li-Ion battery. It provides reliable, long-lasting energy for top performance. The TK18 CU Nichia 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. The thermal protection feature helps prevent overheating. Overheating can harm the flashlight's performance, battery, and safety. The "8" in the IPx8 rating means the highest level of protection. It is against water ingress.

Accessories, package contents

Package contents2 x spare o-rings
spare rubber cover

The clip is very helpful. It lets you quickly access your flashlight while keeping your hands free for other tasks. Attaching a lanyard to your TK18 CU Nichia flashlight provides an additional layer of security. It reduces the risk of accidental drops or loss. 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 TK18 CU Nichia 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 Acebeam 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.


  • lightweight
  • warm light
  • TIR lens
  • tactical switch
  • adequate performance
  • superior CRI
  • multiple modes
  • mode memory
  • tactical strobe
  • low-voltage protection
  • thermal regulation
  • waterproof
  • clip


  • no battery indicator
  • no built-in charger
  • no auxiliary LEDs
  • non-magnetic


Acebeam TK18 CU Nichia / TK18CUN photo 1.
Acebeam TK18 CU Nichia / TK18CUN photo 2.
Acebeam TK18 CU Nichia / TK18CUN photo 3.
Acebeam TK18 CU Nichia / TK18CUN photo 4.
Acebeam TK18 CU Nichia / TK18CUN

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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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