LEDcandle
Flashlight Enthusiast
I was recently playing around with my anglehead on a red filter. The red filter makes the output MUCH dimmer than green/yellow/blue filters.
I was wondering if the reason red 'preserves' night vision is because it is usually so dim that it doesn't cause the eyes to adjust too much? Or is it really the color?
I tried staring at some boxes under my table in a dark room with night adapted eyes. I could make out the shapes and some labels on them. After I turned on my anglehead-red for awhile, my night vision was gone for many seconds before I could see the boxes again.
A super-dim white light source seems to have the same effect, which leaves me to wonder how much the color really affects. Negligibly?
For e.g, a screaming 190 lumen Red-orange light source will definitely kill your night vision, no matter the color.
So is it because its Red or is it because red is perceived as dim? And will an equivalently dim white source have the same preservation effect actually?
I was wondering if the reason red 'preserves' night vision is because it is usually so dim that it doesn't cause the eyes to adjust too much? Or is it really the color?
I tried staring at some boxes under my table in a dark room with night adapted eyes. I could make out the shapes and some labels on them. After I turned on my anglehead-red for awhile, my night vision was gone for many seconds before I could see the boxes again.
A super-dim white light source seems to have the same effect, which leaves me to wonder how much the color really affects. Negligibly?
For e.g, a screaming 190 lumen Red-orange light source will definitely kill your night vision, no matter the color.
So is it because its Red or is it because red is perceived as dim? And will an equivalently dim white source have the same preservation effect actually?