In everyday life, when you need a led flashlight, how many lumens are best for you? This question will have many difference answers. Maybe you want a flashlight with the bigger the better in the lumens and other just needs lumen enough.
So, How many Lumens of Led Flashlight is Best for you?
In my opinion, I like the led flashlight which has output for the biggest possible – the bigger, the better and it built in some mode for range of difference brightness. Remember that the max of output that may be cause to reduce lifespan of led bulb.
Although the producers say that the life span of led bulb is very long (over 50.000 hrs) but when you put your flashlight in operation condition of overdrive the led will reduce life-time and efficiency.
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Depending on the situations, you may want to use flood or throw mode of flashlight. Generally, you will need max output for watching objects at long distance. The bigger lumens the longer distance in watching objects are better.
For choosing right max output (max lumens) most of people based on the demand about the distance that need to monitor in the darkness night, the necessary runtime and lightweight.
There are several points to note as follows, the eyes will adapt well with the amount of light from small to large. If the light is large, the pupil (the dark dot in the middle of the eye, called the pupil, will make your eye muscles adjust to the sudden flash of light) will adjust to open larger for adapting with the darkness and opposite the pupil will adjust to narrow for reduce the light come to your eyes.
So that you can see, high lumens sometime are not necessary because the part of excessive light that wont received by the eyes and make your eyes don’t adapt with the darkness.
I’m a person who had liked a flashlight with “as bright as possible” and I purchased some led flashlight has lumens from 80, 100, 280 and then 450 lumens. In practice, however when using it, sometime I had some “half-crying half-laughing” situations because of max output.
For example, one time in the midnight, I was wake up and thirsty, I didn’t want to wake up my husband so that I didn’t turn on the light instead I take FOURSEVENS Quark AA² and turn it on (set at 115 lumens). It took me a while to see everything because my eyes dazzled and blinded by the strong light of FOURSEVENS Quark AA² and then I set it at 24 lumens – my eyes were become fine.
What are the best Lumens?
Please see two situations (with the same led flashlight) below:
Situation 1: You are walking in the darkness and turning the flashlight on with max output. You heard a sudden noise in the middle distance. You forwarded your flashlight to the noise to find out what happen.
Situation 2: The same situation 1 but you set your flashlight at low lumens that just is enough light to see some meters ahead and when you heard the sudden noise you will set max lumens for watching in long distance.
The same flashlight, the same max output, which situations will get you looking farther? At first view, may be you think two situations get the similar looking farther because of max output.
However, in fact the situation 2 is farther watching than the situation 1 because your eyes adapted well with the darkness so it is very sensitive. With the situation 1 because you using max output from starting so your eyes won’t adapt quickly enough.
Choosing the right Lumens for your Flashlights
Moreover, the eyes sense the light in logarithm line not straight lines. When increase a large number of lumens, the eyes will sense a bit different. That meant with each lumens level you need x1.4 which give you a different. For instance, it is hard to see the difference between 100 and 120 lumens.
If you want to see the difference, you need to increase for 140 lumens comparing with 100 lumens and the farther watching that you get about 19%. If you want to increase farther watching in double, you have to need 400 lumens.
- In bedroom, you just need about 10 lumens that not wake up other people.
- Turn on the room at lost power or waking in alley at night: 30 lumens
- The street at twilight: 50 – 150 lumens
- The street without the light: 200 – 400 lumens
- For outdoor: 400 – 1200 lumens
- For search and rescue operation: 1200+ lumens