Acebeam TK18 CU Osram 1900lm In-depth review, Pros and Cons

3 x Osram KW CSLNM1.TG LEDs
1900 lm output
20500 cd intensity
1 x 18650 Li-Ion battery

The Acebeam TK18 CU Osram (TK18CUO) released in 2019. It uses 3 x Osram KW CSLNM1.TG LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 1900 lm output, 20500 cd intensity, and a beam distance of 286 m.

The TK18 CU Osram flashlight is an indispensable tool in various situations, from everyday tasks and outdoor adventures to emergency preparedness and professional use. TIR lens plays a significant role in shaping the beam pattern of the TK18 CU Osram flashlight. This light has 5 modes of lighting. The mode memory of TK18 CU Osram contributes to a more seamless and intuitive user experience. It has a strobe function, which is one of the most effective self defense tools available.

Acebeam TK18 CU Osram (TK18CUO) pictures

Acebeam TK18 CU Osram / TK18CUO photo
Acebeam TK18 CU Osram / TK18CUO photo
Acebeam TK18 CU Osram / TK18CUO photo
Acebeam TK18 CU Osram / TK18CUO photo
Acebeam TK18 CU Osram / TK18CUO

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 Acebeam TK18 CU Osram, then don’t hesite and signal the problem to us.

Acebeam TK18 CU Osram (TK18CUO) specifications

NameTK18 CU Osram
Rated 3/5 based on 1272 user votes.

Flashlights enable you to navigate in the dark, locate supplies, signal for help, or provide comfort and security in challenging circumstances.


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

This 124.5 g flashlight would be considered slightly heavier than average for a handheld flashlight, but it is still within a reasonable weight range. This weight range is often found in smaller and more compact flashlights designed for everyday use or portability. The length of a flashlight can also impact its balance and weight distribution. A well-balanced flashlight, where the weight is evenly distributed, can be more comfortable to hold for longer periods and reduce hand fatigue. This flashlight comes in a sleek copper color option.


Emitter3 x Osram KW CSLNM1.TG LEDs
Color temperature6500 K
Switchmechanical rear

The emitter of TK18 CU Osram manufactured by Osram, a German lighting manufacturer. Osram is a well-known and respected LED manufacturer in the lighting industry. 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 TK18 CU Osram consists of a single-piece lens made of a transparent material, typically acrylic or polycarbonate. Its shape and internal geometry are designed to achieve specific light distribution patterns, such as flood or spot beams, by manipulating the behavior of light rays.

The TK18 CU Osram has mechanical switch. Mechanical switches often offer tactile feedback, allowing users to feel a distinct click or resistance when the switch is pressed. This feedback helps users confirm that the switch has been activated or deactivated, providing a reassuring sense of control and awareness. The placement of the rear switch at the end of the TK18 CU Osram flashlight facilitates a secure forward grip. This grip allows for better control and handling of the flashlight, especially in situations where precision and stability are important.


Flux1900 lm
Intensity20500 cd
Throw286 m
CD/LM factor10.79

The 1900 lm output of TK18 CU Osram provides greater versatility, as you can adjust the brightness levels to suit different lighting needs. The TK18 CU Osram flashlight with 20500 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 distance refers to the maximum distance at which the flashlight can effectively illuminate an object or target. The stated throw distance typically indicates the point at which the brightness falls below a specified threshold, such as 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.


Modes5 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 TK18 CU Osram 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 TK18 CU Osram is tactical strobe ready. The strobe light is disorienting to the person it is aimed at which makes it difficult for them to concentrate.


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

The Acebeam TK18 CU Osram flashlight is powered by 1 x 18650 Li-Ion battery. The TK18 CU Osram doesn't have charger port. A charger port is a designated connection point or interface where you can plug in a charger to recharge the flashlight's battery. 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 TK18 CU Osram has thermal protection feature. The thermal protection mechanisms are designed to monitor and regulate the temperature of the flashlight during operation. This feature helps prevent overheating, which can be detrimental to the flashlight's performance, battery, and overall safety. The TK18 CU Osram flashlight with IPx8 rating can withstand being submerged in water beyond 1 meter for a prolonged period, typically specified by the manufacturer.


Package contents2 x spare o-rings
spare rubber cover

The clip provides flexibility in how you carry your flashlight. When gripping the flashlight with the lanyard around your wrist, it provides a more secure and stable hold. Regularly replacing worn or damaged O-rings helps maintain the overall durability and performance of the flashlight.

The performance of the Acebeam TK18 CU Osram 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.

Acebeam TK18 CU Osram (TK18CUO) comparisons

According to our statistics, the Acebeam TK18 CU Osram flashlight was most often compared on our site with the following flashlights.

Acebeam L19 (L19) Acebeam L19 Acebeam E70 (E70) Acebeam E70 Acebeam T27 (T27) Acebeam T27 Acebeam L35 P70 (L35P70) Acebeam L35 P70 Acebeam H17 Nichia (H17N) Acebeam H17 Nichia Acebeam EC65 Nichia (EC65N) Acebeam EC65 Nichia Acebeam X80 (X80) Acebeam X80 Acebeam H40 SST20 (H40SST20) Acebeam H40 SST20

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