What happened to the darkening of Diablo II?

In the second act, you need to collect the Horatique Rubik's Cube, the talisman of the seven claws and the staff of the king. When you are ready to catch the talons, you will find that it is already dark. You have a task to investigate what happened in this darkness. Then when you get the talons, several balls of light will run out of the box where the talons are hidden, so it will be very bright.

In addition, in the dark, the visual range of the attribute "+lighting range" in the equipment properties will be larger.

Adjusting the brightness of the display also helps. It won't be dark at night unless there is something wrong with your monitor settings.