Sometimes we hear of them, but more often they work in absolute darkness.

In the absolute darkness, there was no sign of life.

She could not see him in the storm's almost absolute darkness.

This solution can be kept for about a month in absolute darkness.

The light show ended, and over us fell absolute darkness.

We tried doing it in absolute darkness, one room apart.

After that, a brief period of waiting in absolute darkness.

In the absolute darkness behind these thick walls I had to make my way by touch.

It was absolute darkness in which light seemed to be an unknown factor.

A sharp click and the room was in absolute darkness.