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Nitecore

Nitecore Thumb Leo flashlight review

1 x unspecified LED, 1 x unspecified 365nm UV LED
45 lm output
150 cd intensity
integrated Li-Ion battery

The Nitecore Thumb Leo flashlight was released in 2017. It uses 1 x unspecified LED, 1 x unspecified 365nm UV LED, no reflector and integrated Li-Ion battery. The powerful emitter in this flashlight provides up to 45 lm output, 150 cd intensity, and a beam distance of 24 m.

Interested to see if this Nitecore flashlight is a hit? Find out soon!

Table of Contents

  • Nitecore Thumb Leo specifications
    • Body, materials, weight, colors
    • System, LED, lens, reflector
    • Performance, flux, intensity, throw
    • Software, user interface, modes
    • Features, battery, protections
    • Accessories, package contents
    • Links
  • 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.

Nitecore Thumb Leo / THUMBLEO

The Thumb Leo flashlight is an essential tools for emergency preparedness. This light has 3 modes of lighting. Without mode memory, this flashlight always starts in the default mode. This USB rechargeable flashlight is small and light.

Nitecore Thumb Leo specifications

BrandNitecore
NameThumb Leo
TypeTHUMBLEO
Rating
Rated 3 / 5 based on 1511 user votes.
Launch2017
Formflashlight

This Nitecore flashlight offers portability, versatility, and reliability.

Nitecore Thumb Leo / 2

Body, materials, weight, colors

Weight25 g
Length74 mm
Head diameter24 mm
Materialplastic
Colorsblack

The 25 g flashlight may not provide the same level of brightness or features as larger models. The best flashlight size depends on personal preference. This flashlight features a captivating black color.

Nitecore Thumb Leo / 1

System, LED, lens, reflector

Emitter1 x unspecified LED, 1 x unspecified 365nm UV LED
Color temperature6500 K
Reflectorno
Lensno
Switchelectronic side

The color temperature choice depends on the light's use and personal taste. Some flashlights with electronic switches have programmable features.

Nitecore Thumb Leo / 3

Performance, flux, intensity, throw

Flux45 lm
Intensity150 cd
Throw24 m
CD/LM factor3.33

You mainly need a flashlight for basic tasks like finding keys or navigating in dimly lit areas, 45 lm can be enough. 150 cd can make things quite bright. It's enough for many everyday tasks. The throw distance is the farthest distance the flashlight can light an object. The candela per lumen (cd/lm) ratio can be used to determine if a flashlight has a spot or flood type beam.

Software, user interface, modes

Modes3 modes
Mode memoryno
Ramping modeno
Strobeno
SOS/Beaconyes

A flashlight's modes are different output settings or brightness levels. The SOS signal is commonly used in outdoor adventures or survival scenarios.

Features, battery, protections

Batteryintegrated Li-Ion battery
Battery indicatoryes
Charger portmicroUSB
LVPno
Thermal regulationno
ProtectionIPx8
Impact resistance1 m
AUX LEDsyes
Magneticno
SpecialsUV light
adjustable head
red/blue light

The Thumb Leo flashlight utilizes integrated Li-Ion battery as its power source. The battery indicator helps users check the battery status. The built-in charger allows for convenient and versatile charging. The Thumb Leo flashlight lacks built-in LVP. You should use a protected battery to prevent over-discharging. Flashlights without thermal protection may be more susceptible to overheating under extreme conditions.

The flashlight has an IPx8 rating. It can withstand being submerged in water beyond 1 meter for a prolonged period. A flashlight's impact resistance can vary. It depends on its design, construction, and intended use. Auxiliary LEDs usually use less power than the main light source. Thumb Leo's UV light can reveal urine and other stains left by pets.

Accessories, package contents

Package contentskeyring

Official sitehttps://flashlight.nitecore.com/

Conclusion, pros and cons

This Nitecore 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.

Pros

  • lightweight
  • side switch
  • multiple modes
  • SOS/beacon function
  • integrated battery
  • battery indicator
  • USB charger
  • waterproof
  • auxiliary LEDs
  • UV light

Cons

  • plastic body
  • unspecified LED
  • cool light
  • moderated performance
  • low intensity
  • no mode memory
  • no LVP
  • no thermal regulation
  • non-magnetic

Photos

Nitecore Thumb Leo / THUMBLEO photo 1.
Nitecore Thumb Leo / THUMBLEO photo 2.
Nitecore Thumb Leo / THUMBLEO photo 3.
Nitecore Thumb Leo / THUMBLEO photo 4.
Nitecore Thumb Leo / THUMBLEO

Comparisons

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

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Updated: May 2, 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.