How does an LED flashlight affect vision lumens?

Anyone who owns a LED flashlight has to understand how this device is related and how can it affects the human eye. Therefore, in this article you are given a short presentation of the biology of the LED flashlights. Likewise, it will enable you to understand how to use these devices in a safe manner.

Firstly, you should know that the human eye is made from cones and rods. Rods are responsible for the sight on the edge of the vision. They help us see in unclear conditions and are also in charge with the black and with images in the nighttime world. At the same time, cones offer us sight in the colorful conditions during the day and respond for the human vision field. Cones are the main responsible for detecting color and all the other visual details.

Moreover, cones and rods work together and provide the human being with sight regardless of the light conditions in the environment. And this is why, if you misuse a powerful light, such as the LED flashlight, you can completely destroy you night vision. Also, different light conditions will cause the rhodopsin molecules included in the rods to chance their shape dramatically. Very strong light will provoke the rhodopsin molecules to change their shape extremely fast, and will take them a long time to regain their original shape. This is exactly why several consecutive flashlights can be a real danger for our night vision for minimum thirty minutes.

Furthermore, a flashlight which features a red light option will be less harmful for the eyes because this kind of light cannot be detected by the rods. Still, the cones can detect it, thus they are capable of providing us with night vision. Most of you probably know that out pupils are the ones that control the quantity of light that enters the eye. However, there are many people who are not aware of the logarithmic pattern of the light detector in our eyes. They need to double the quantity of light in order to distinguish any shift in brightness. Add to this the fact that the human eye is damaged by bright light and you can understand why a powerful flashlight can completely destroy our vision.

For all these reasons, when we are using a LED flashlight, which has an extremely strong light, we have to make sure that we change it gradually and that we use the red light as often as possible. Additionally, you should opt for a type of LED flashlight which matches you needs best. For instance, if you need to see away, choose a narrower beam. Also, if you want to see the items in your proximity opt for a scattered light.