Olight I3S EOS 80lm In-depth review, Pros and Cons

Cree XP-G2 LED
80 lm output
361 cd intensity
1 x AAA battery

The Olight I3S EOS (I3SEOS) released in 2013. It uses Cree XP-G2 LED, OP reflector and 1 x AAA battery. The powerful emitter in this flashlight provides up to 80 lm output, 361 cd intensity, and a beam distance of 38 m.

The I3S EOS flashlight provides instant illumination at the touch of a switch. This immediate response is particularly useful in emergency situations. This light has 3 modes of lighting. The lack of mode memory means you need to adjust the flashlight's settings each time you turn it on. It has a strobe function, which is one of the most effective self defense tools available.

Olight I3S EOS (I3SEOS) pictures

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Olight I3S EOS / I3SEOS

We base the specifications below on the official data published by the manufacturer, while also considering user reviews. If you found an error or something lacking in the specifications for the Olight I3S EOS, then tell us.

Olight I3S EOS (I3SEOS) specifications

Rated 4 / 5 based on 1370 user votes.

The I3S EOS flashlight allows you to light dark areas. It helps you find hazards or stop threats by shining light on them.


Weight26.5 g
Length69.5 mm
Body diameter14 mm
Head diameter14 mm
Materialaluminium alloy

The I3S EOS is small, compact, and designed for ultra-portability. Consider the length of the flashlight. It should fit comfortably in your chosen way to carry it. The aluminium body of the I3S EOS has excellent thermal conductivity. This means it can effectively dissipate heat generated by the flashlight's components. The I3S EOS flashlight is available in assorted colors: black, blue, purple, red, yellow.


EmitterCree XP-G2 LED
Color temperature5000 K

Cree is a US-based LED manufacturer. It is well-regarded for its high-quality products and innovation in lighting. Color temperature is a characteristic of light. It is used to quantify the color appearance of light sources. The designers of the I3S EOS incorporated an orange peel reflector to enhance the beam. It does this by diffusing the light from the light source.


Flux80 lm
Intensity361 cd
Throw38 m
CD/LM factor4.51

80 lm can provide a decent amount of brightness and be suitable for many everyday tasks. 361 cd can make things quite bright. It's enough for many everyday tasks. The throw is the distance in meters at which the flashlight produces a light intensity of 0.25 lux. The cd/lm factor is the candela-to-lumen ratio. It shows how concentrated a light source's output is.


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. Strobe mode on I3S EOS flashlight produces a rapid, repeated flashing of light.


Battery1 x AAA battery
Battery indicatorno
Charger portno
Thermal regulationno

The Olight I3S EOS flashlight is powered by 1 x AAA battery. The I3S EOS cannot charge batteries. You may need an external charger to keep your battery going. Use a protected battery. This flashlight lacks low voltage protection (LVP). Flashlights without thermal protection may rely on other design elements to dissipate heat. These elements include heat sinks, fins, or body materials with good thermal conductivity. The "8" in the IPx8 rating means the highest level of protection. It is against water ingress.


Package contents2 x spare o-rings
AAA battery
carrying case
key ring

It comes with a battery. The battery must be fully charged before you first use your I3S EOS. Replacing worn or damaged O-rings helps a lot. It keeps up the flashlight's durability and performance.

According to the ANSI/NEMA FL1 Standard, we measure the performance of the Olight I3S EOS flashlight 30 seconds after switching on the light. The ANSI/NEMA FL1 2009 Standard is a set of flashlight performance guidelines.

If there’s information about the Olight I3S EOS that you would like to see on this site, then write to us.

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