Fenix SD11 1000lm In-depth review, Pros and Cons

1 x Cree XM-L2 U2 LED, 1 x Cree XQE RED LED
1000 lm output
505 cd intensity
1 x 18650 Li-Ion battery

The Fenix SD11 (SD11) released in 2017. It uses 1 x Cree XM-L2 U2 LED, 1 x Cree XQE RED LED, no reflector and 1 x 18650 Li-Ion battery. The powerful emitter in this diving light provides up to 1000 lm output, 505 cd intensity, and a beam distance of 45 m.

This light has 2 modes of lighting. This flashlight does not have memory function.

Fenix SD11 (SD11) pictures

Fenix SD11 / SD11 photo
Fenix SD11 / SD11 photo
Fenix SD11 / SD11

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 Fenix SD11, then don’t hesite and signal the problem to us.

Fenix SD11 (SD11) specifications

Rated 4/5 based on 1211 user votes.
Formdiving light


Weight132 g
Length138 mm
Body diameter26 mm
Head diameter34 mm
Materialaluminium alloy with HAIII hard-anodized finish

The 132 g flashlight is generally comfortable to hold for extended periods and easy to carry in pockets or bags. They are suitable for various applications such as camping, hiking, or emergency situations. A 120-gram flashlight strikes a good balance between functionality, convenience, and weight. The ideal length of a flashlight depends on personal preference, intended use, and the specific features and functionality you're looking for.

Aluminium body of SD11 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. 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. The SD11 flashlight is available in black.


Emitter1 x Cree XM-L2 U2 LED, 1 x Cree XQE RED LED
Color temperature5000 K
Lenstoughtened AR coated glass
Switchrotary front

Cree LEDs are commonly used in a wide range of lighting applications. Their products are trusted by lighting professionals and have gained a strong reputation for quality and performance. The choice of color temperature depends on the specific lighting application and personal preferences. This flashlight has an AR coated lens. This Anti-Reflective coating is a thin optical coating applied to the surface of the lens to minimize reflections and improve light transmission.


Flux1000 lm
Intensity505 cd
Throw45 m
CD/LM factor0.51

With 1000 lm, the SD11 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. 505 cd can provide a reasonable level of luminous intensity for many everyday lighting tasks. 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.


Modes2 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
Protectiondepth 100 meters
Specialsred light
white light

The SD11 flashlight utilizes 1 x 18650 Li-Ion battery as its power source. The SD11 cannot charge batteries directly. You may need an external charger to keep your battery going. LVP (Low Voltage Protection) is designed to protect the battery from being over-discharged, which can lead to reduced battery life or even permanent damage. The built-in thermal control automatically adjusts brightness output to prevent overheating.


Package contents2 x spare o-rings
brand ring
camera mount

The lanyard of SD11 helps protect the flashlight from accidental damage by preventing it from falling or hitting the ground. Having spare O-rings allows you to replace them as needed, ensuring that the flashlight maintains its water-tight seal and remains protected from moisture or water ingress.

The performance of the Fenix SD11 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.

Fenix SD11 (SD11) comparisons

According to our statistics, the Fenix SD11 flashlight was most often compared on our site with the following flashlights.

Fenix TK26R (TK26R) Fenix TK26R Fenix E03R V2.0 (E03RV2) Fenix E03R V2.0 Fenix RC20 (RC20) Fenix RC20 Fenix PD35 TAC (PD35TAC) Fenix PD35 TAC Fenix TK35 2018 (TK352018) Fenix TK35 2018 Fenix E09R (E09R) Fenix E09R Fenix TK22 UE (TK22UE) Fenix TK22 UE Fenix E28R (E28R) Fenix E28R

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