Why are emergency exit signs all green
Generally, emergency exit signs can be seen in shopping malls, buildings and other buildings. Emergency exit signs with small green people and arrows to guide the direction of safety exits are classic signs of emergency exits, some will add "EXIT" to emphasize that this is the exit!
And the emergency exit signs are mainly green. Have you ever wondered why this is?
Moreover, it is common sense that red is more visually stimulating than green. This is why many warning signs, stop signs, and traffic diagrams choose red as the main color. In this case, why not display emergency exit signs in red?
In fact, the human eye can distinguish colors because there are two very important cells in the retina, one is called rod-shaped cells and the other is called pyramidal cells. When the light is weak, the rod-shaped cells are more active. Can absorb more light, when the light is brighter, the cone cells are more active.
The emergency exit signs are generally dimly lit, or power outages may occur in emergencies, causing the emergency exit to be in a dark state where you can’t see your fingers. In addition, the rod-shaped body cells have a feature that they can easily absorb green. So in the darker the environment, the easier it is to see green.
Although many countries use green emergency exit signs, after all, some countries have different national conditions, and some countries use red as instructions.
Finally, I want to remind everyone that it is very important to find the emergency exit signs first when entering the building, so that you don't know where to escape when there is a danger!