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What Are Lumens in a Flashlight?

What Are Lumens in a Flashlight?

When shopping around for flashlights, you may have run across the term “lumens” when reading the packaging. When it comes to light, most people are familiar with “watts” which is how light bulbs are rated for the public. But what are lumens in flashlights and why are they important?

The Definition of Lumens

A lumen is a unit of measurement for the amount of light generated by bulb or flashlight.

As horsepower describes the amount of engine power available, lumens describes the amount of light output as a measurement of candle strength. Therefore, one lumen provides enough light to illuminate the same area as one candle or candela.

While the term lumens has been around for a considerable amount of time, until recently it was rarely used in the United States and certain other countries. Most people are more familiar with the term “watts”.


Difference between Lumens and Watts

Up until 2012, packaging for light bulbs used the term “watts” to describe the amount of power that the bulb used for illumination purposes. A 100 watt light was brighter than a 60 watt light because it used more power. With the introduction of LED lights, power was no longer the primary consideration, and instead, lumens became the new standard. LEDs use a fraction of the energy compared to incandescent light bulbs.

Therefore, lumens became the more appropriate term plus it is used worldwide which helps create a single standard that requires no translation.


Understanding Lumens in Flashlights:

When shopping around for flashlights, lumens are a very important consideration. You will need to be familiar with the amount of light required for the different types of flashlights available.

Tactical: The tactical version is a high lumens flashlight designed to blind or disorient a potential assailant. Plus, many tactical flashlights offer low lumens setting so you can successfully navigate at night. For tactical flashlights, you’ll need at least 130 lumens on the high setting to do the job with a low light setting of 5 to 15 lumens for navigation.


Camping: For camping purposes, you’ll need a flashlight that offers many hours of light as you find your way around the tent. One popular version is the lantern flashlight that offers different settings of brightness to meet your needs. However, a standard flashlight is very handy when you need to find something without disturbing other people. 5 to 100 lumens are best for camping purposes.

Emergency: The purpose of the emergency flashlight is to attract attention to your location. You’ll need the brightest LED flashlight lumens with a pulse or strobe setting which can be seen for miles away. Also, you’ll need a low-level setting if you get lost at night and need to find your way around.


There are also military and night vision uses for flashlights that have specific requirements usually based on government standards. Durability and versatility are vital for military flashlights which in many respects are similar to tactical flashlights found in retail stores. For night vision equipment, the flashlight must not be bright enough to interfere with the operation while still providing enough luminescence to see around you.

All in all, understanding what lumens are and the brightness you need for your flashlight will help considerably when choosing between different models.

2 thoughts on “What Are Lumens in a Flashlight?

  1. avatar Victor Stone says:

    quick and clear thank you.I am a coummunity patroler who works in conjunction with the police and will use your explanation at our next meeting.

  2. avatar D. Young says:

    Thank you for explaining that to me.

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