After you turn your
bedroom light off
You can see objects in the dark, so you can walk without
any fear of tripping over. |
Sudden power
interruptions and you have no battery nearby
You can see in total darkness which prevents panic. |
Emergency escapes in the
darkness
You can clearly see stairways and doors. |
Lamp breaks in a disaster
The lamp glows in the dark even if it breaks, so there's
no fear of treading on broken fragments. |