Acebeam PT40 LH351D (2020) review

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.

It uses a TIR lens to form the beam pattern. This light does not have memory function.

Table of contents:

Acebeam PT40 LH351D (PT40LH351D) specifications

NamePT40 LH351D
Rated 4/5 based on 869 user votes.


The aluminium body of flashlight treated with a Type III hard-anodized, anti-abrasive finish.

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


A TIR lens works on the principle of total internal reflection. The TIR lens collimates the LED light into efficient, well-controlled light beams that maximize the usable lumens in the target area.

Emitter6 x Samsung LH351D LEDs
Color temperature6000 K
Switchmechanical side


The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam. Well-focused spot beams can be over 100 cd/lm, tactical flashlights are typically between 20-100 cd/lm, and work lights are less than 10 cd/lm.

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


Modes1 mode
Mode memoryno
Ramping modeno


The PT40 LH351D cannot charge batteries directly. You may need an external charger to keep your battery going. This flashlight has a built-in low voltage protection (LVP) to prevent damage to the cell from over-discharge, so protected cells are not necessary. The built-in thermal control automatically adjusts brightness output to prevent overheating. The PT40 LH351D is magnetic so that the flashlight can be attached to some metallic surfaces.

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


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

Package contentsclip

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.

The specifications above 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) pictures

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

Acebeam PT40 LH351D (PT40LH351D) comparisons

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