Acebeam H50 LH351D 2000lm In-depth review, Pros and Cons

3 x Samsung LH351D LEDs
2000 lm output
4700 cd intensity
1 x 18650 Li-Ion battery

The Acebeam H50 LH351D (H50LH351D) released in 2020. It uses 3 x Samsung LH351D LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this headlamp provides up to 2000 lm output, 4700 cd intensity, and a beam distance of 137 m.

The H50 LH351D headlamp provides hands-free lighting. By wearing this headlamp on your head or helmet, you can direct the light wherever you look, leaving your hands free to perform tasks or activities. TIR lenses of the H50 LH351D are engineered to optimize optical efficiency by reducing light scattering and minimizing lens artifacts. This light has 5 modes of lighting. With mode memory, when you turn off the H50 LH351D and then turn it back on again, it will automatically activate the mode that was last used before it was turned off. This USB rechargeable flashlight is designed to be compact and lightweight, making them highly portable and easy to carry.

Acebeam H50 LH351D (H50LH351D) pictures

Acebeam H50 LH351D / H50LH351D photo
Acebeam H50 LH351D / H50LH351D photo
Acebeam H50 LH351D / H50LH351D photo
Acebeam H50 LH351D / H50LH351D photo
Acebeam H50 LH351D / H50LH351D photo
Acebeam H50 LH351D / H50LH351D

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 H50 LH351D, then don’t hesite and signal the problem to us.

Acebeam H50 LH351D (H50LH351D) specifications

NameH50 LH351D
Rated 4/5 based on 1225 user votes.

Headlamps consist of a light source attached to a headband, allowing users to wear them hands-free.


Weight62 g
Length83 mm
Body diameter26 mm
Head diameter33 mm
Dimensions83 x 33 x 26 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 62 g flashlight may not provide the same level of brightness or features as larger models, it can be handy for quick and convenient illumination in emergency situations or for close-range tasks. The length of the H50 LH351D flashlight can affect its portability. A shorter flashlight is generally easier to carry in a pocket, bag, or pouch, making it more convenient for everyday use or when you're on the go.

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. Hard-Anodized Type III (HAIII) is a specific anodizing process that creates a thicker and harder oxide layer compared to regular anodizing. It involves subjecting the aluminum to a higher voltage and a sulfuric acid bath, resulting in a dense and durable coating. This flashlight features a captivating black color.


Emitter3 x Samsung LH351D LEDs
Color temperature6500 K
Switchelectronic side

The emitter of H50 LH351D manufactured by Samsung, a Korean LED manufacturer. The choice of color temperature depends on the specific lighting application and personal preferences. 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 H50 LH351D 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.


Flux2000 lm
Intensity4700 cd
Throw137 m
CD/LM factor2.35

The 2000 lm output of H50 LH351D provides greater versatility, as you can adjust the brightness levels to suit different lighting needs. With 4700 cd, the H50 LH351D 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.


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 H50 LH351D 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 H50 LH351D 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 18650 Li-Ion battery
Battery indicatoryes
Charger portUSB Type-C
Thermal regulationyes

The H50 LH351D flashlight utilizes 1 x 18650 Li-Ion battery as its power source. The H50 LH351D 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. USB rechargeable flashlights have become increasingly popular in recent years due to their convenience and sustainability.

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 H50 LH351D 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 H50 LH351D 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
USB Type-C cable

When using spare O-rings, it's important to follow the manufacturer's instructions and guidelines for proper installation.

The performance of the Acebeam H50 LH351D 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 H50 LH351D (H50LH351D) comparisons

According to our statistics, the Acebeam H50 LH351D flashlight was most often compared on our site with the following flashlights.

Acebeam H20 (H20) Acebeam H20 Acebeam K30 GT (K30GT) Acebeam K30 GT Acebeam H17 Nichia (H17N) Acebeam H17 Nichia Acebeam H50 LH351D (H50LH351D) Acebeam H50 LH351D Acebeam D46 (D46) Acebeam D46 Acebeam M20 (M20) Acebeam M20 Acebeam EC35 (EC35) Acebeam EC35 Acebeam L17 (L17) Acebeam L17

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