Seeknite SD03 diving light review

Cree XM-L2 LED
1200 lm output
22500 cd intensity
1 x 26650 Li-Ion battery

The Seeknite SD03 diving light was released in 2019. It uses Cree XM-L2 LED, SMO reflector and 1 x 26650 Li-Ion battery. The powerful emitter in this diving light provides up to 1200 lm output, 22500 cd intensity, and a beam distance of 300 m.

Curious if the SD03 shines bright? You'll find out soon!

Table of Contents

  • Seeknite SD03 specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
  • Conclusion, pros and cons
  • Photos
  • Comparisons

The content of this article reflects our own experiences and viewpoints. We aim to offer insights on a topic, and we hope others find it helpful and motivating. Additionally, we make every effort to provide accurate and comprehensive coverage. If you found an error or something lacking in the specifications for the Seeknite SD03, then tell us.

Seeknite SD03 / SD03

This light has 3 modes of lighting. Without mode memory, each time you turn on the SD03, it will start from the default or first mode in the sequence.

Seeknite SD03 specifications

Rated 4 / 5 based on 1453 user votes.
Formdiving light

Seeknite SD03 / 3

Body, materials, weight, colors

Weight168 g
Length138 mm
Head diameter38 mm
Materialaluminium alloy with HAIII hard-anodized finish

The SD03 is generally comfortable to hold for a long time. It is also easy to carry in pockets or bags. Consider the length of the flashlight. It should fit comfortably in your chosen way to carry it. Aluminium is a lightweight material, which is beneficial for SD03 flashlight. The HAIII coating is often matte or textured. This finish improves grip and feels nice in the hand. This flashlight comes in a sleek black color option.

Seeknite SD03 / 1

System, LED, lens, reflector

EmitterCree XM-L2 LED
Color temperature6500 K
Switchelectronic side

Cree is widely regarded as a reputable LED manufacturer. Warm, white light is generally more comfortable. It's also less harsh on the eyes than cool, white light. If you need long-range light, get a flashlight with a smooth reflector. It will have more throw distance. The electronic switches may have a higher chance of standby drain.

Seeknite SD03 / 2

Performance, flux, intensity, throw

Flux1200 lm
Intensity22500 cd
Throw300 m
CD/LM factor18.75

The 1200 lm output of SD03 provides great flexibility. You can adjust the brightness to fit different needs. The SD03 flashlight has 22500 cd. It can light objects at greater distances. The throw distance is the farthest distance the flashlight can light an object. Candela per lumen (cd/lm) measures a flashlight's beam intensity. It compares this to its total luminous flux or output.

Software, user interface, modes

Modes3 modes
Mode memoryno
Ramping modeno

A flashlight's modes are different output settings or brightness levels. They can be chosen to meet different needs and preferences. The SOS signal is an international distress call. It indicates an urgent need for help.

Features, battery, protections

Battery1 x 26650 Li-Ion battery
Battery indicatoryes
Charger portno
Thermal regulationno
Protectiondepth 100 meters

The SD03 flashlight's power source is 1 x 26650 Li-Ion battery. It provides reliable, long-lasting energy for top performance. A battery indicator is a feature. It shows the remaining power level of the flashlight's battery. The SD03 doesn't have charger port. The SD03 flashlight lacks built-in LVP. You should use a protected battery to prevent over-discharging. This flashlight doesn't have built-in temperature control.

Accessories, package contents

Package contentslanyard

Attaching a lanyard to your SD03 flashlight provides an additional layer of security. It reduces the risk of accidental drops or loss.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the SD03 flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

Conclusion, pros and cons

This Seeknite flashlight, like any other, has its strengths and weaknesses. Let's take a close look at both sides to understand this flashlight better. I share my thoughts on its standout features and the parts that might need improvement. Keep in mind, these are just my opinions, and you might have a different perspective.


  • lightweight
  • aluminium body
  • side switch
  • adequate performance
  • super bright
  • multiple modes
  • SOS/beacon function
  • battery indicator


  • cool light
  • no mode memory
  • no built-in charger
  • no LVP
  • no thermal regulation
  • no auxiliary LEDs
  • non-magnetic


Seeknite SD03 / SD03 photo 1.
Seeknite SD03 / SD03 photo 2.
Seeknite SD03 / SD03 photo 3.
Seeknite SD03 / SD03 photo 4.
Seeknite SD03 / SD03

Seeknite SD03 comparisons

According to our statistics, the Seeknite SD03 flashlight was most often compared on our site with the following flashlights.

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Updated: April 23, 2024

David Hagon
I love bushcraft and flashlights. I find joy in mastering wilderness survival skills and exploring the realm of illuminating gadgets. Bushcraft isn't just fun, it's a learning journey. I form a strong bond with nature. It's more than a hobby, it enriches me in practical and spiritual ways.