Klarus E1 1000lm In-depth review, Pros and Cons

1000 lm output
9025 cd intensity
1 x special 18650 Li-Ion battery

The Klarus E1 (E1) released in 2019. It uses Cree XP-L HI LED, TIR reflector and 1 x special 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 1000 lm output, 9025 cd intensity, and a beam distance of 190 m.

The E1 is an impressive flashlight that offers both power and reliability. Its robust build and outstanding illumination make it a versatile lighting instrument. TIR lens plays a significant role in shaping the beam pattern of the E1 flashlight. This light has 4 modes of lighting. Since the E1 flashlight automatically recalls the last used mode, there is no need to access higher brightness levels or additional features unless specifically required. The strobe function can be utilized as a self-defense tool, providing a non-lethal means to deter or disorient attackers

Klarus E1 (E1) pictures

Klarus E1 / E1 photo
Klarus E1 / E1 photo
Klarus E1 / E1 photo
Klarus E1 / E1 photo
Klarus E1 / E1 photo
Klarus E1 / E1 photo
Klarus E1 / E1

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 Klarus E1, then don’t hesite and signal the problem to us.

Klarus E1 (E1) specifications

Rated 4/5 based on 1224 user votes.

Flashlights enable you to navigate in the dark, locate supplies, signal for help, or provide comfort and security in challenging circumstances.


Weight50.5 g
Length105.1 mm
Body diameter22 mm
Head diameter23 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 50.5 g flashlight would be considered extremely lightweight for a handheld flashlight. The length of the E1 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. Aluminium is a lightweight material, which is beneficial for E1 flashlight. 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 comes in a sleek black color option.


EmitterCree XP-L HI LED
Color temperature6500 K
Switchdual electronic rear

Cree is widely regarded as a reputable LED manufacturer and has a track record of delivering high-quality and innovative lighting solutions. Warm white light is generally considered more comfortable and less harsh on the eyes compared to cool white light. The TIR lens of E1 consists of a single-piece lens made of a transparent material, typically acrylic or polycarbonate. Its shape and internal geometry are designed to achieve specific light distribution patterns, such as flood or spot beams, by manipulating the behavior of light rays.

The E1 has electronic switch. The electronic switches may have a higher likelihood of standby drain compared to mechanical switches since they require a small amount of power for operation. The rear switch of E1 is typically operated with the thumb or finger, making it easily accessible and convenient to use. The positioning of the switch at the rear of the flashlight allows for natural and intuitive operation, particularly in one-handed scenarios.


Flux1000 lm
Intensity9025 cd
Throw190 m
CD/LM factor9.03

The 1000 lm output of E1 provides greater versatility, as you can adjust the brightness levels to suit different lighting needs. With 9025 cd, the E1 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. 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.


Modes4 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 E1 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. The strobe function on the E1 flashlight is a feature that produces a rapid and repetitive flashing of light. It is designed to create a disorienting or attention-grabbing effect. The E1 has an SOS signal mode. The SOS code consists of three short signals, followed by three long signals, and then three short signals again.


Battery1 x special 18650 Li-Ion battery
Battery indicatorno
Charger portyes, on special battery
Thermal regulationyes

The power source of the E1 flashlight is 1 x special 18650 Li-Ion battery, providing reliable and long-lasting energy for optimal performance. When the E1 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 E1 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 E1 flashlight with IPx8 rating can withstand being submerged in water beyond 1 meter for a prolonged period, typically specified by the manufacturer.


Package contentsclip
microUSB cable
spare o-ring
special 18650 battery

The included battery is selected to meet the specific power requirements of the E1 flashlight, ensuring reliable and efficient operation. The clip is useful to keep the light secured in your pocket. The lanyard prevents accidental loss of the flashlight. Regularly replacing worn or damaged O-rings helps maintain the overall durability and performance of the flashlight.

The performance of the Klarus E1 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.

Klarus E1 (E1) comparisons

According to our statistics, the Klarus E1 flashlight was most often compared on our site with the following flashlights.

Klarus XT21X (XT21X) Klarus XT21X Klarus XT11S (XT11S) Klarus XT11S Klarus E1 (E1) Klarus E1 Klarus XT12GT (XT12GT) Klarus XT12GT Klarus XT1A (XT1A) Klarus XT1A Klarus 360X1 (360X1) Klarus 360X1 Klarus G10 (G10) Klarus G10 Klarus G15 (G15) Klarus G15

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