Run way / emergency stairs

When there is a fire in a building, it is extremely difficult to fumble your way to the exit in the dark.
There is even greater difficulty when using the stairs and not moving on a level ground. In an emergency situation, people often dash forward recklessly, especially if the emergency lights don’t come on. In the chaos, people stumble and other people step on them. So there is a real concern for secondary damage. Therefore a design is proposed that can reduce the secondary damage. Even when the power has been cut off, it can still indicate the direction and location because it is self-powered.