Lumintop GT Nano 450lm In-depth review, Pros and Cons

450 lm output
23400 cd intensity
1 x 10180 Li-Ion battery

The Lumintop GT Nano (GTNano) released in 2020. It uses Osram KW CSLNM1.TG LED, SMO reflector and 1 x 10180 Li-Ion battery. The powerful emitter in this flashlight provides up to 450 lm output, 23400 cd intensity, and a beam distance of 306 m.

The GT Nano flashlight is an essential tools for emergency preparedness. In situations like natural disasters or blackouts, when electricity is unavailable, a flashlight becomes crucial for navigating dark areas. Instead of having to cycle through multiple modes to find the desired setting, mode memory of GT Nano ensures that the flashlight starts in the mode you prefer or need. The strobe function produces a high-frequency flashing light pattern that is designed to disorient or distract potential threats or aggressors. The USB charger port allows you to charge this flashlight using alternative power sources.

Lumintop GT Nano (GTNano) pictures

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Lumintop GT Nano / GTNano

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 Lumintop GT Nano, then don’t hesite and signal the problem to us.

Lumintop GT Nano (GTNano) specifications

NameGT Nano
Rated 3 / 5 based on 1139 user votes.

This flashlight can easily fit into pockets, backpacks, or glove compartments, allowing you to carry them wherever you go.


Weight17 g
Length52.5 mm
Body diameter14 mm
Head diameter24 mm
Materialaluminium alloy with HAIII hard-anodized finish

This 17 g flashlight would generally be considered lightweight and easy to handle for most people. A well-balanced flashlight, where the weight is evenly distributed, can be more comfortable to hold for longer periods and reduce hand fatigue. Aluminium body of GT Nano is known for its durability and strength. It offers excellent resistance to impacts, scratches, and corrosion. The HAIII process produces a hard and wear-resistant surface on the aluminum, making it more resistant to scratches, abrasions, and impacts. The GT Nano flashlight is available in black.


EmitterOsram KW CSLNM1.TG LED
Color temperature6500 K
LensAR coated glass
Switchelectronic side

Osram LEDs are known for their high performance, energy efficiency, and reliability. The choice of color temperature depends on the specific lighting application and personal preferences. With the smooth reflector, the beam tends to have a well-defined hotspot at the center, which provides a concentrated beam of light for long-range applications. The Anti-Reflective coating is a thin optical coating applied to the surface of the lens to minimize reflections and improve light transmission. Some flashlights with electronic switches have programmable features that allow users to customize the behavior of the flashlight.


Flux450 lm
Intensity23400 cd
Throw306 m
CD/LM factor52

450 lm can provide a decent amount of brightness and be suitable for many everyday tasks. The GT Nano flashlight with 23400 cd has an extended throw distance, allowing you to illuminate objects or areas at greater distances. The throw is the calculated distance in meters at which the flashlight produces a light intensity of 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.


Mode memoryyes
Ramping modeyes

NarsilM firmware includes thermal regulation to monitor and adjust the flashlight's output based on temperature. 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 ramping mode of the GT Nano is intuitive, and lets you seamlessly ramp the output up and down over almost the entire output range. The strobe function on the GT Nano flashlight is a feature that produces a rapid and repetitive flashing of light. The SOS signal is commonly used in outdoor adventures or survival scenarios.


Battery1 x 10180 Li-Ion battery
Battery indicatoryes
Charger portmicroUSB
Thermal regulationyes
Impact resistance1 m

The GT Nano flashlight utilizes 1 x 10180 Li-Ion battery as its power source. Having a battery indicator allows users to monitor the battery status and make informed decisions regarding recharging or replacing the battery. The USB charger port on a flashlight can be particularly useful in emergency situations where access to power outlets may be limited. 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 GT Nano has thermal protection feature. The thermal protection mechanisms are designed to monitor and regulate the temperature of the flashlight during operation. The "8" in the IPx8 rating indicates the highest level of protection against water ingress. With an impressive impact resistance rating of 1 m, this flashlight is built to endure accidental drops or impacts.


Package contents10180 battery
2 x spare o-rings
microUSB cable
microUSB charger

With an included battery you can immediately use the flashlight for your desired applications, saving time and allowing you to focus on your tasks or activities. When gripping the flashlight with the lanyard around your wrist, it provides a more secure and stable hold. Instead of searching for compatible O-rings, having spare O-rings readily available allows for convenient and immediate repairs or replacements.

The performance of the Lumintop GT Nano 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.

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