Acebeam D20 2700lm In-depth review, Pros and Cons

2700 lm output
24200 cd intensity
1 x 21700 Li-Ion battery

The Acebeam D20 (D20) released in 2019. It uses Cree XHP35 HD LED, SMO reflector and 1 x 21700 Li-Ion battery. The powerful emitter in this diving light provides up to 2700 lm output, 24200 cd intensity, and a beam distance of 311 m.

This light has 2 modes of lighting. Instead of having to cycle through multiple modes to find the desired setting, mode memory of D20 ensures that the flashlight starts in the mode you prefer or need.

Acebeam D20 (D20) pictures

Acebeam D20 / D20 photo
Acebeam D20 / D20 photo
Acebeam D20 / D20 photo
Acebeam D20 / D20 photo
Acebeam D20 / D20

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 D20, then don’t hesite and signal the problem to us.

Acebeam D20 (D20) specifications

Rated 4/5 based on 1219 user votes.
Formdiving light


Weight128 g
Length136 mm
Body diameter27 mm
Head diameter34 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 128 g flashlight is generally comfortable to hold for extended periods and easy to carry in pockets or bags. They are suitable for various applications such as camping, hiking, or emergency situations. A 120-gram flashlight strikes a good balance between functionality, convenience, and weight. The ideal length of a flashlight depends on personal preference, intended use, and the specific features and functionality you're looking for.

Aluminium body of D20 is known for its durability and strength. It offers excellent resistance to impacts, scratches, and corrosion, making it suitable for rugged outdoor use or in demanding environments. The HAIII process produces a hard and wear-resistant surface on the aluminum, making it more resistant to scratches, abrasions, and impacts. This improves the overall durability of the flashlight body. The D20 flashlight is available in black.


EmitterCree XHP35 HD LED
Color temperature6500 K
Lenstoughtened AR coated glass
Switchelectronic side

Cree LEDs are commonly used in a wide range of lighting applications. Their products are trusted by lighting professionals and have gained a strong reputation for quality and performance. The choice of color temperature depends on the specific lighting application and personal preferences. With the smooth reflector of the D20, the beam tends to have a well-defined hotspot at the center, which provides a concentrated beam of light for long-range applications.

This flashlight has an AR coated lens. This Anti-Reflective coating is a thin optical coating applied to the surface of the lens to minimize reflections and improve light transmission. The D20 has electronic switch. Some flashlights with electronic switches have programmable features that allow users to customize the behavior of the flashlight. This may include setting specific modes, configuring brightness levels, or enabling unique functions according to individual preferences.


Flux2700 lm
Intensity24200 cd
Throw311 m
CD/LM factor8.96

With 2700 lm, the D20 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 D20 flashlight with 24200 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. The cd/lm factor (candela-to-lumen ratio) provides information about how concentrated or focused the light output of a light source is. A higher cd/lm ratio indicates that the light is more concentrated in a specific direction, while a lower ratio indicates a more diffused or spread-out light output.


Modes2 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 D20 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. SOS mode of the D20 produces a specific sequence of long and short flashes to signal distress or emergency situations. It is commonly used in outdoor adventures or survival scenarios.


Battery1 x 21700 Li-Ion battery
Battery indicatoryes
Charger portno
Thermal regulationyes
Protectiondepth 200 meters

The D20 flashlight utilizes 1 x 21700 Li-Ion battery as its power source. The D20 has a battery indicator. A battery indicator is a feature that provides information about the remaining power level of the flashlight's battery. It helps users monitor the battery status and estimate how much runtime they have left before the battery needs to be recharged or replaced. The D20 cannot charge batteries directly. You may need an external charger to keep your battery going.

LVP (Low Voltage Protection) is designed to protect the battery from being over-discharged, which can lead to reduced battery life or even permanent damage. The built-in thermal control automatically adjusts brightness output to prevent overheating.


Package contents18650 adapter
2 x spare o-rings
21700 battery with microUSB
microUSB cable

With an included battery you can immediately use the flashlight for your desired applications, saving time and allowing you to focus on your tasks or activities. The lanyard of D20 helps protect the flashlight from accidental damage by preventing it from falling or hitting the ground. Having spare O-rings allows you to replace them as needed, ensuring that the flashlight maintains its water-tight seal and remains protected from moisture or water ingress.

The performance of the Acebeam D20 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 D20 (D20) comparisons

According to our statistics, the Acebeam D20 flashlight was most often compared on our site with the following flashlights.

Acebeam H60 (H60) Acebeam H60 Acebeam E75 (E75) Acebeam E75 Acebeam E10 (E10) Acebeam E10 Acebeam T36 (T36) Acebeam T36 Acebeam EC35 Gen II (EC35G2) Acebeam EC35 Gen II Acebeam T21 (T21) Acebeam T21 Acebeam P16 (P16) Acebeam P16 Acebeam UC15 (UC15) Acebeam UC15

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