Nitecore EF1 830lm In-depth review, Pros and Cons

Cree XM-L2 U3 LED
830 lm output
18300 cd intensity
1 x 18650 Li-Ion battery

The Nitecore EF1 (EF1) released in 2017. It uses Cree XM-L2 U3 LED, SMO reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this flashlight provides up to 830 lm output, 18300 cd intensity, and a beam distance of 271 m.

The EF1 flashlight is an indispensable tool in various situations, from everyday tasks and outdoor adventures to emergency preparedness and professional use. This light has 3 modes of lighting. This flashlight does not have memory function.

Nitecore EF1 (EF1) pictures

Nitecore EF1 / EF1 photo
Nitecore EF1 / EF1 photo
Nitecore EF1 / EF1 photo
Nitecore EF1 / EF1

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 Nitecore EF1, then don’t hesite and signal the problem to us.

Nitecore EF1 (EF1) specifications

Rated 3/5 based on 1196 user votes.

The EF1 flashlight enhances safety by illuminating potential hazards and improving visibility in low-light conditions.


Weight250 g
Length152.2 mm
Body diameter32 mm
Head diameter40 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 250 g flashlight would be considered moderately heavy for a handheld flashlight. The weight may provide advantages like increased durability or the ability to house larger batteries for longer runtime. The length of the EF1 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 body of EF1 is known for its durability and strength. It offers excellent resistance to impacts, scratches, and corrosion, making it suitable for rugged outdoor use or in demanding environments. HAIII coating is widely used in the flashlight industry due to its durability, corrosion resistance, improved grip, and aesthetic appeal. The EF1 flashlight is available in black.


EmitterCree XM-L2 U3 LED
Color temperature6500 K
Lens10 mm epoxy resin explosion-suppressive
Switchelectronic side

The emitter of EF1 manufactured by Cree, a US-based LED manufacturing company. Cree is a well-regarded LED manufacturer known for its high-quality products and innovation in the lighting industry. Color temperature is a characteristic of light. It is measured in units called Kelvin (K) and is used to quantify the color appearance of light sources, particularly white light. The EF1 has a smooth reflector. The properly focused smooth reflector gives you a more cohesive hotspot and therefore throws better. The EF1 utilizes electronic switch. Electronic switches on flashlights provide a range of advantages and additional features compared to mechanical switches.


Flux830 lm
Intensity18300 cd
Throw271 m
CD/LM factor22.05

With 830 lm, the EF1 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. The EF1 flashlight with 18300 cd has an extended throw distance, allowing you to illuminate objects or areas at greater distances. This can be advantageous for outdoor activities, search and rescue operations, or scenarios where long-range visibility is required.

The throw is the calculated distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor (candela-to-lumen ratio) provides information about how concentrated or focused the light output of a light source is. A higher cd/lm ratio indicates that the light is more concentrated in a specific direction, while a lower ratio indicates a more diffused or spread-out light output.


Modes3 modes
Mode memoryno
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.


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

The Nitecore EF1 flashlight is powered by 1 x 18650 Li-Ion battery. The EF1 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 "5" in the IP54 rating represents the level of protection against solid objects, specifically dust and foreign particles. The IP54 rated flashlight is protected against dust ingress to a limited extent. The EF1 flashlight proudly boasts an exceptional impact resistance rating of 1.5 m.


Package contentslanyard
nylon holster

The package includes a holster to safely store your flashlight. The lanyard prevents accidental loss of the flashlight.

The performance of the Nitecore EF1 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.

Nitecore EF1 (EF1) comparisons

According to our statistics, the Nitecore EF1 flashlight was most often compared on our site with the following flashlights.

Nitecore MH11 (MH11) Nitecore MH11 Nitecore TM03 (TM03) Nitecore TM03 Nitecore MH20 (MH20) Nitecore MH20 Nitecore MT42 (MT42) Nitecore MT42 Nitecore NU43 (NU43) Nitecore NU43 Nitecore P10GT (P10GT) Nitecore P10GT Nitecore MH20GT (MH20GT) Nitecore MH20GT Nitecore MH25GT (MH25GT) Nitecore MH25GT

If there’s information about the Nitecore EF1 that you would like to see on this site, then write to us.

FlashlightChart.com / Flashlights / Nitecore / Nitecore EF1 (2017)