Acebeam PT40 LH351D 3000lm In-depth review, Pros and Cons

6 x Samsung LH351D LEDs
3000 lm output
2500 cd intensity
1 x 18650 Li-Ion battery

The Acebeam PT40 LH351D (PT40LH351D) released in 2020. It uses 6 x Samsung LH351D LEDs, TIR reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 3000 lm output, 2500 cd intensity, and a beam distance of 100 m.

The PT40 LH351D flashlight provides instant illumination at the touch of a switch. This immediate response is particularly useful in emergency situations or when you need instant visibility. TIR technology minimizes hotspots, dark spots, and irregularities in the beam of PT40 LH351D. Lack of mode memory means you need to manually adjust the flashlight's settings each time you turn it on to get the desired mode.

Acebeam PT40 LH351D (PT40LH351D) pictures

Acebeam PT40 LH351D / PT40LH351D photo
Acebeam PT40 LH351D / PT40LH351D photo
Acebeam PT40 LH351D / PT40LH351D

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 PT40 LH351D, then don’t hesite and signal the problem to us.

Acebeam PT40 LH351D (PT40LH351D) specifications

NamePT40 LH351D
Rated 4/5 based on 1056 user votes.

The PT40 LH351D flashlight enhance personal safety and security. It allows you to illuminate dark areas, identify potential hazards, or deter threats by shining light on them.


Weight95 g
Length126.8 mm
Body diameter24 mm
Head diameter32.8 mm
Materialaluminium alloy with HAIII hard-anodized finish
desert tan

The PT40 LH351D is small, compact, and designed for ultra-portability. The length of the PT40 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 body of PT40 LH351D has excellent thermal conductivity, meaning it can effectively dissipate heat generated by the flashlight's components, such as the LED or battery.

The HAIII coating can also enhance the visual appearance of the flashlight. It offers a uniform and attractive finish, often available in different colors, giving the flashlight a sleek and professional look. The choice of flashlight body color can be influenced by factors such as intended use, environment, personal style, and functional requirements.


Emitter6 x Samsung LH351D LEDs
Color temperature6000 K
Switchmechanical side

The emitter of PT40 LH351D manufactured by Samsung, a Korean LED manufacturer. Warm white light is generally considered more comfortable and less harsh on the eyes compared to cool white light. The TIR lens of PT40 LH351D can minimize light loss and achieve high light output by capturing and redirecting a significant portion of the emitted light. This can result in improved overall beam quality, better beam control, and reduced stray light. The PT40 LH351D has mechanical switch. Mechanical switches are known for their durability and reliability. They are typically built with robust construction, making them resistant to wear and tear, and capable of enduring various environmental conditions.


Flux3000 lm
Intensity2500 cd
Throw100 m
CD/LM factor0.83

With 3000 lm, the PT40 LH351D 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. With 2500 cd, the PT40 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 is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. Candela per lumen (cd/lm) is a measure of a flashlight's beam intensity relative to its total luminous flux or output. It quantifies the concentration of light emitted by the flashlight in relation to the total amount of light produced.


Modes1 mode
Mode memoryno
Ramping modeno


Battery1 x 18650 Li-Ion battery
Battery indicatorno
Charger portno
Thermal regulationyes
Impact resistance1.5 m

The power source of the PT40 LH351D flashlight is 1 x 18650 Li-Ion battery, providing reliable and long-lasting energy for optimal performance. The PT40 LH351D cannot charge batteries directly. You may need an external charger to keep your battery going. When the PT40 LH351D 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.

The built-in thermal control automatically adjusts brightness output to prevent overheating. The IPx6 rating indicates that the PT40 LH351D flashlight has a protection against water jets. It is recommended to handle flashlights with care and avoid subjecting them to unnecessary rough treatment to ensure their longevity and reliable operation. This feature can be especially useful in situations where you need a stable and directed light source while keeping your hands available for work or other activities.


Package contentsclip

The clip is useful to keep the light secured in your pocket.

The performance of the Acebeam PT40 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 PT40 LH351D (PT40LH351D) comparisons

According to our statistics, the Acebeam PT40 LH351D flashlight was most often compared on our site with the following flashlights.

Acebeam L30 Gen II (L30GENII) Acebeam L30 Gen II Acebeam H30 R+UV (H30RUV) Acebeam H30 R+UV Acebeam EC60 (EC60) Acebeam EC60 Acebeam X80 (X80) Acebeam X80 Acebeam H17 Nichia (H17N) Acebeam H17 Nichia Acebeam TK17 Samsung (TK17S) Acebeam TK17 Samsung Acebeam EC50 Gen III (EC50GENIII) Acebeam EC50 Gen III Acebeam L18 (L18) Acebeam L18

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