Sorry rekiem, but that is moderately dark, a bit too dark.
Remember that people have their monitor settings at different levels- their dark tones may be much more exxagerated than yours.
In the screen, I'm assuming the character is the playable character, and that one little light barely shows anything- I can barely, barely make out other figures and things in the screen. Making it so that no one has to run into walls before they realize that there's a wall is pretty bad.
And darkness isn't always a substitute for fear or suspense- there are many things you can do, such as ambience, fog and better lighting effects, etc. to help out besides just making everything completely dark.