Acebeam M50 LH351D flashlight review

Samsung LH351D LED
200 lm output
460 cd intensity
integrated 10150 Li-Ion battery

The Acebeam M50 LH351D flashlight was released in 2019. It uses Samsung LH351D LED, TIR reflector and integrated 10150 Li-Ion battery. The powerful emitter in this flashlight provides up to 200 lm output, 460 cd intensity, and a beam distance of 43 m.

Want to find out if the Acebeam M50 LH351D is good? Keep reading to know!

Table of Contents

  • Acebeam M50 LH351D specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
  • Conclusion, pros and cons
  • Photos
  • Comparisons

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 M50 LH351D, then tell us.

Acebeam M50 LH351D / M50LH351D

The M50 LH351D flashlight is a key tool in many situations. It's used for everyday tasks, outdoor adventures, emergencies, and professional work. TIR lens plays a significant role in shaping the beam pattern of the M50 LH351D flashlight. This light has 2 modes of lighting. Without mode memory, each time you turn on the M50 LH351D, it will start from the default or first mode in the sequence. The flashlight uses rechargeable batteries. You can recharge them with a USB cable connected to a power source.

Acebeam M50 LH351D specifications

NameM50 LH351D
Rated 4 / 5 based on 1457 user votes.

This Acebeam flashlight offers portability, versatility, and reliability in providing illumination.

Acebeam M50 LH351D / 1

Body, materials, weight, colors

Weight11 g
Length43.3 mm
Head diameter13.9 mm
Materialaluminium alloy with HAIII hard-anodized finish

An extremely lightweight handheld flashlight weighs 11 g. A smaller flashlight is easier to carry in a pocket, bag, or pouch. This makes it more convenient for everyday use or when you're on the go. Aluminium is a lightweight material, which is beneficial for M50 LH351D flashlight. Flashlight makers widely use HAIII coating. It is durable, resists corrosion, and improves grip. It also looks good. This flashlight comes in a sleek black color option.

Acebeam M50 LH351D / 2

System, LED, lens, reflector

EmitterSamsung LH351D LED
Color temperature5000 K

The emitter of M50 LH351D manufactured by Samsung, a Korean LED manufacturer. Color temperature is a characteristic of light. It is used to quantify the color appearance of light sources. The M50 LH351D's TIR lens is made of a single piece of transparent material. This material is typically acrylic or polycarbonate.

Acebeam M50 LH351D / 3

Performance, flux, intensity, throw

Flux200 lm
Intensity460 cd
Throw43 m
CD/LM factor2.3

You mainly need a flashlight for basic tasks like finding keys or navigating in dimly lit areas. 200 lm can be enough. It can also be enough for occasional use around the house. 460 cd can make things quite bright. It's enough for many everyday tasks. The throw distance is the farthest distance the flashlight can light an object. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.

Software, user interface, modes

Modes2 modes
Mode memoryno
Ramping modeno

A flashlight's modes are different output settings or brightness levels. They can be chosen to meet different needs and preferences.

Features, battery, protections

Batteryintegrated 10150 Li-Ion battery
Battery indicatoryes
Charger portmicroUSB
Thermal regulationno

The Acebeam M50 LH351D flashlight is powered by integrated 10150 Li-Ion battery. The battery indicator lets you know when the battery is low, charging, or fully charged. This flashlight can charge the battery with a built-in charger. It works with a USB power source. LVP (Low Voltage Protection) is designed to protect the battery. It stops over-discharging, which can reduce battery life or cause permanent damage.

This flashlight doesn't have built-in temperature control. The flashlight has an IPx8 rating. It can withstand being submerged in water beyond 1 meter for a prolonged period. The manufacturer specifies this.

Accessories, package contents

Package contents2 x spare o-rings
microUSB cable

Replacing worn or damaged O-rings helps a lot. It keeps up the flashlight's durability and performance.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the M50 LH351D 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
  • aluminium body
  • warm light
  • TIR lens
  • multiple modes
  • integrated battery
  • battery indicator
  • USB charger
  • low-voltage protection
  • waterproof


  • moderated performance
  • low intensity
  • no mode memory
  • no thermal regulation
  • no auxiliary LEDs
  • non-magnetic


Acebeam M50 LH351D / M50LH351D photo 1.
Acebeam M50 LH351D / M50LH351D photo 2.
Acebeam M50 LH351D / M50LH351D photo 3.
Acebeam M50 LH351D / M50LH351D photo 4.
Acebeam M50 LH351D / M50LH351D

Acebeam M50 LH351D comparisons

According to our statistics, the Acebeam M50 LH351D flashlight was most often compared on our site with the following flashlights.

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Updated: April 29, 2024

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.