Fenix WT20R 400lm In-depth review, Pros and Cons

1 x Cree XP-G3 LED, 1 x Cree XD16 S3 LED
400 lm output
3434 cd intensity
1 x ARB-LP-2000U Li-Ion battery pack

The Fenix WT20R (WT20R) released in 2019. It uses 1 x Cree XP-G3 LED, 1 x Cree XD16 S3 LED, SMO reflector and 1 x ARB-LP-2000U Li-Ion battery pack. The powerful emitter in this flashlight provides up to 400 lm output, 3434 cd intensity, and a beam distance of 117 m.

This flashlight has a wide range of applications across various domains. It is an indispensable tool for outdoor activities like camping, hiking, or night-time exploration, offering guidance and safety. TIR lenses of the WT20R are engineered to optimize optical efficiency by reducing light scattering and minimizing lens artifacts. This light has 3 + 3 modes of lighting. Since the WT20R flashlight automatically recalls the last used mode, there is no need to access higher brightness levels or additional features unless specifically required.

Fenix WT20R (WT20R) pictures

Fenix WT20R / WT20R photo
Fenix WT20R / WT20R photo
Fenix WT20R / WT20R photo
Fenix WT20R / WT20R

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 Fenix WT20R, then don’t hesite and signal the problem to us.

Fenix WT20R (WT20R) specifications

Rated 3/5 based on 1280 user votes.

This Fenix flashlight is designed to be compact and handheld, making it easy to carry and maneuver.


Weight154 g
Length117.5 mm
Body diameter28.3 mm
Head diameter43.2 mm
Materialaluminium alloy with HAIII hard-anodized finish

The WT20R generally comfortable to hold for extended periods and easy to carry in pockets or bags. 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. The aluminium bodies can be anodized, providing a protective layer and a wide range of color options for flashlight bodies. Anodizing enhances the corrosion resistance, hardness, and scratch resistance of the aluminum, while also allowing for a variety of attractive finishes.

The HAIII coating often has a matte or textured finish, which enhances grip and provides a comfortable feel in the hand. This can be particularly useful in situations where a secure grip on the flashlight is essential, such as in wet or slippery conditions. This flashlight features a captivating black color.


Emitter1 x Cree XP-G3 LED, 1 x Cree XD16 S3 LED
Color temperature6500 K
Switchelectronic side

Cree is widely regarded as a reputable LED manufacturer and has a track record of delivering high-quality and innovative lighting solutions. Warm white light is generally considered more comfortable and less harsh on the eyes compared to cool white light. The WT20R features a smooth reflector (SMO). If long-range illumination and throw distance are the primary requirements, a flashlight with a smooth reflector may be more suitable.

This TIR lens offers flexibility in achieving various beam patterns, from wide-angle illumination to focused spotlights, depending on the specific design of the lens. The WT20R has electronic switch. The electronic switches may have a higher likelihood of standby drain compared to mechanical switches since they require a small amount of power for operation.


Flux400 lm
Intensity3434 cd
Throw117 m
CD/LM factor8.59

If you mainly need a flashlight for basic tasks like finding keys, navigating in dimly lit areas, or occasional use around the house, 400 lm can be adequate. With 3434 cd, the WT20R 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 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. Flashlights with a higher cd/lm ratio typically excel in long-range throw and focused beam applications, while flashlights with a lower cd/lm ratio may provide a wider and more evenly distributed beam for closer-range illumination or general-purpose use.


Modes3 + 3 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 WT20R 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.


Battery1 x ARB-LP-2000U Li-Ion battery pack
Battery indicatoryes
Charger portyes, on special battery
Thermal regulationno
Specialsadjustable head

The power source of the WT20R flashlight is 1 x ARB-LP-2000U Li-Ion battery pack, providing reliable and long-lasting energy for optimal performance. Having a battery indicator on a flashlight is beneficial as it allows users to monitor the battery status and make informed decisions regarding recharging or replacing the battery. It helps prevent unexpected power failures during critical situations and ensures that the flashlight is ready for use when needed.

When the WT20R 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 "6" in the IP66 rating represents the level of protection against solid objects, specifically dust and foreign particles. It indicates that the WT20R flashlight, is fully protected against the entry of dust and other solid objects. The IP66 rating indicates that the WT20R flashlight has a protection against water jets. The WT20R flashlight effortlessly clings to metal surfaces, granting you the freedom to go hands-free and explore versatile mounting possibilities.


Package contentsARB-LP-2000U battery pack
microUSB cable
spare o-ring

The included battery is selected to meet the specific power requirements of the WT20R flashlight, ensuring reliable and efficient operation. When gripping the flashlight with the lanyard around your wrist, it provides a more secure and stable hold. When using spare O-rings, it's important to follow the manufacturer's instructions and guidelines for proper installation.

The performance of the Fenix WT20R 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.

Fenix WT20R (WT20R) comparisons

According to our statistics, the Fenix WT20R flashlight was most often compared on our site with the following flashlights.

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